Bulletin No. 220 q . / D, Petrography and Mineralogy, 25 

£56nes I B, Chemistry and Physics, 39

DEPA'ETMENT OF THE INTERIOR

UNITED STATES GEOLOGICAL SURVEY x

CHARLES D. WALCOTT, DIRECTOR

MINERAL ANALYSES

FROM THE

LABORATORIES OF

188O to 19O3

TABULATED BY

F. "W. OLAUKE, Chief Chemist

WASHINGTON

GOVERNMENT PRINTING OFFICE

1903

CONTENTS.

Page

jy. Letter of transmittal, by George F. BeckerI............................... 7

Introduction. .....'.........I.........---.------..---...---.-----...--...- 9

I. Native elements ...........................................^........... 10

Gold .___..___._.___..________ _...__.._.____._______ ............... 10

Josephinite ...................................... .....^........^.... 10

II. Sulphides and arsenides. .............................................. 11

Bismuthinite ......-.--.-.--.....--.-..-......... .................. 11

 Metacinnabarite-.....____._.__._____-..______.__---.-..-----.--..__- ll

Covellite.--.. ..'.................................................... 11

Polydymite....-......-._.........--'................................. 12

Stromeyerite .......-...........-.----.---...------..----.--.-.---. 12

Sulphide of silver, copper, and zinc. -...--...-.--..-.-..-........... 12

Lollingite ........................................................... 13

Enargite ......'....................-.........-.........-........... 13

Cuprobismutite.. ...'............................................... 14

) Zinkenite........-....--...-.....--...-.---...---.---.-.--....-.---. 14

Warrenite....... ..... ...---.....--..--..-...-..--..-.--...-..--.... 14

Cosalite .-.............._.....,.---.----....---...._-.-.--.-.-..-.- 15

Freieslebenite _ -.-.,.-.........-.----.---...--...--.....--.-'-.--.-. 15

Guitermanite..........',...........--.--.---.-...---.-...-...--.--_ 15

III. Tellurides.--.-........-..---.--.--...-.-.-...---.-.....-...--........ 16

Hessite.......-..---,..-....-...-..----..-......--.--..-...---..-.. 16

" Petzite ...............:'.......^.................................... 16

Calaverite -...-.-...-,..-.----..-------.-.-.-..--------.-----.-..--.. 16

Melonite.-............-........--.-.-.-.-.-.----..--...-.---..-.... 17

IV. Chlorides and fluorides.........--..---.....-.....--...--...-.-..--.... 17

Halite................. .........'................................... 17

Embolite..............................".....................:...... 17

Cryolite........ ....................1............................. 17

Pachnolite...........-.......-...-.--..--..---..---...-'...:....--.... 18

Elpasolite . ...................._.....-.-..-.......--.-............. 18

Gearksutite. -........-..........-.---..--.....-.-.----. ---.....-. 18

Prosopite ......,...........................................:........_ 19

Tysonite. ................ ....^.............................^...... 19

V. Oxides and hydroxides ........-..-..----.-----.-.'-.-.._.-.----.----... 20

Spinel...-..: .................. ............:....................... 20

Gahnite.---.....-.-.._---....---...---....--....----..-.-..---.-.. 20

Magnetite ............................'............................. 20

Chromite --...-....-.---.-..--.....--.....-.---....--.-......--.-... 21

Rutile.-.-..-..-.--..---.-. -....--...-.....---...----.---....-.... 21

Diaspore. ............................... ..---..---...------.......... 21

Bauxite.. ......................-.-. ..---....-.-.-..-.-.--......-... 21

Bmcite..............--.--.-....--.--.---.-....-....--.-..-..--.--. 22

i. Psilomelane -......-........-..----...--..-...--....---.----...--..-. 22-

3
CONTENTS.

VI. Carbonates ............^......................................... ....... 23

Dolomite -...---..---_...---.'-...._..--........ ........:........... 23

Smithsonite._______---___-_--______._----_____-----____-..---_._____ 23

Bastnasite --___-__----____-.---_.__--_--------_.--.____._.--.......... 24

. Urao .I-...--------------------------.-----...---..-.--.-----.---.. 24

VII.. Silicates-.-.............-..--.--.-...-..........-.....-..-.-........- 25

Petalite '............-.--...-.--.-..-.-.----.-- ---.....--.----.----- 25

Orthoclase and niicrocline.......................................... 25

Albite-....---..-..---.-....... ................................... 26

Anorthite ......................................................... 27

Soda-lime feldspars .......-.-.......---_--..---.--.....----........ 28

Leu cite------..--..-.-...---------.---.---..-.-----.----------.---- 30

Enstatite--.--.-.-----_-_----..-_--_----___.-----___________-.._... 30

Hypersthene......................'.................................. 31

Pyroxene ........... ^.................., ^......................... 32

^Egirite .--.......---....--'.-..-..--.-.--.....-...-....-....-....._. 34

Jadeite ...._....--..--...--.--.---.. .--.-.-----.----.------..-...-'. 35

Wollastonite ............... ..._....- -... .-..- ----.--.-- - 36

Pectolite ........................................................ 36

Amphibole ........---.....----...------...-------...-..-.......... 37

Beryl--.-.----.------.-----.--------------.,-.-----------..--------- 42

Nephelite.--.-.---------.--- -..--.---------.------------.------.----_ 42

Caiicrinite -...-..-..-....-..-.--...._...--........... ...--....._..._ 43

SodaJite. .:-------- -------- -----------.---.-----.----.:--- 44

Zunyite ..--..-.---.-..-...--.-.....---.--.-.--. ..--.-.-----.-.---. 44

Garnet...--....------.-------.-...-------.-..-.-.----------------.- 45

Chrysolite ........................................................... 47

Mizzonifce..-......----.--..-----.-.--.--.-..------ .............'..... 48

Vesuvianifce ............................................... ......... 48

Zoisite ..--...------.-..-..-----..-.._---.-..--------.--.---.._-.-. 49

Epidote ........-.---.---.--.----.------ ----.----.---...--------.- 50

Piedmontite ....................................................... . 50

Allanite -----.-.-.--.-------------.--.-.-.-.---.-.................. 51

Prehnite..-.------------------------------------------------------- 51

Topaz --.----_..----.--...---.--...-._.---.......-_...........-.-... 52

Sillimanite .................................................... i... 52

Kyanite.---.-.----...-..-------------------.----------------------- 52

Ilvaite.. --------------------------------.----_.-----_-..----.-.-... 53

Calamine ............................-.:.....-.-...--------.-..---. 53

Lawsonite -.--_-----_-------..----_.----..----.--.---_.------.-.-.-- 53

Staurolite ..._....-.-.....--...--.------------------_--------------- 54

Q-adolinite.. .'.....'...................... ^..... .................... 54

Yttrialite ......................................................... 55

Rowlandite ................................ ...:L...... .............. 55

Mackintoshite -.--..-----.---..----------. .--------:...----..--..-.--- 55

Cyrtolite.-----------.---- -- .-. ----------- ------- 56

Danbiarite --.-.---..-..--..-i-------------------------------------- 57

Datolite __--._-.__--_._-_..--.--_----------_-.----------.--------.- 57

Axinite...........---....--..-.----------.-.-------------------- - 57

Durnortierite ........................................^. .........'....' 58

Tourmaline.........-...-..---..----.----.---------.-------. -.....- 58

Gyrolite--.-.--------....---------.---.--..--------.--.------------ 64
CONTENTS. . 5

fage.

VII. Silicates Contirmed. . Apophyllite. ______..._._.______..._.__ _____-._-----_---.__--..___--- 64

Ptilolite......... ._--...._.._.- .--.__;.-_----- _ --.-.-.--- 65

Henlandite ........-----............-....-.-...-.-...-..-.--.....-. 65

Stilbite----.--....-.--.-'-----------------. - ..--.----- 66

Laumontite..____ I....--...................--.--.--..--------.-.-.-.- 66

Chabazite ......................................................... 67

Levynite .............^...............................^............ 67

Analcite....... 1...,-...------.....---.._.-..--.-------.-..--.-.-_- 68

Natrolite--_.__.-_.--...-....--------.....----------------------_--. 68

Scolecite ........................................ .^............... 69

Mesolite.........---_----._----------..__----------------------_--. 69

Thomsonite. ......................................................... 70

Hydronephelite.....-----..--......--.--....-..--...-.....---...... 70

Muscovite ..........................^............................... 71

Lepidolite ......... ..-.-......-...---.......--..--................. 73

Cryophyllite......................................................... 74

Biotite ............-....-.....--..--......-....-.----.-....-..-.... 74

JPhlogopite..........---.....:...-.---......-....................... 76

Lepidomelene........--.-....--........_-.-.---.-------.---......... 77

Roscoelite ......^.................................................. 78

Margarite . ..................... .....'......-....................... 78

Chloritoid............--........-.-.-....--....-.-........... ....... 79

Xanthophyllite ...............................................^.... 79

The vermictilites. ............................'--.-.................. 80

Clinochlore....-........-..--------.----.--.-.-.-.....-...-..-....- 83

Prochlorite......................................................... 84

Sei'pentine.....--..---.-...--..-.--......----'-..---.---............. 84

Genthite .......--.----...-...-_.-.--....-..-.-..-................. 88

Talc.---......----.-----.....-........---.-----.------..-.......... 89

Glauconite ........................................................ 89

Kaolinite............--...-.......---.....-.--.---.................. 90

HaUoysite......................................-.-..-._...-........... 90

Cimolite..... .................................................. ^... 91

Pyrophyllite....:..-.-..--....-----........-...-...-.............-. 91

Bole.-..-...........------.-.---.--.---.-----------------.-.---. .. 91

VIII. Titanates and titano-silicate..-------......-.................. ..... 92

Ilmenite......... -.-._...--..... --......---..-..-.................. 92

Xanthitane ........-----.......---.-......-.--.--........... ....... 92

Titanite .'.......'.................................................... 92

Tscheffkinite...-,--.-.-..-------------.-----.--------.--.-.-...... "93

Astrophyllite .....------.--.----.-.--.---..----.--. .-.--.-.......... 93

IX. Columbo-tantalat'es.:.-.....-.--...-..---.-.-.-.---.---............... 94

Samarskite .........- -..-....--.... ._....--------................. 94

X. Eorates -..-..............-----.-.--.......-..--.--..---............... . 95

Colemanite .............................-.-.---....---............. 95

Ulexite. ........................................................... 95

Ludwigite -........-.-.--..-.--.-..--...........---.................. 95

Warwickite .--....-----.-..-------.-. I --.-----.-.---..------ ..".-.. 96

XL Nitrates-..-.....-.-------:..... ........-...............'............. 96

Soda niter ......................................................... '96

Niter..-.....-.-.-..--..-....-.....-......--.-.-............ ------ 96
CONTENTS.

XII. Phosphates.-...--.......----...-----.-.-.-.------.--.-....-..-----. 97

Xenotime .^......................................................... 97

Apatite.--..-.---..-...-.--.-. ----.--.......--.-.---..........---- 97

Triplite..--.-------._.-.-----------I---.-...------------------------ 98

Turquoise ....-_.............--..-.-....--..---.-...--..-...-....-. 98

XIII. Vanadates....---.-..-..--....--.--.,'.....---------------.-.----.---- 99

Descloizite.______.___.._--__---.-.-_---_.-------.---_-_____.---_---- 99

Carnotite.---.........----------.-..-------.-..--.--............---- 100

XIV. Arsenites and antimonites.,.-.--..--.-----.----....-...--.-.---.--- 101

Olivenite ........................................................... 101

Erinite.......... ._.....--..-..............._....................... 101

Clinoclasite............-..-------.......--.--.-....--..-........-.-. 101

Conichalcite .......... ..........................-..'...............'.. 102

Tyrolite ........................................................... 102

Chenevixite.............---.-----.--..------..-..-....._..--....--- 102

Mixite...-.---....-..,.....-..---..-............................-.-. 103

Scorodite--------.------.----.---------------.-^.--..-------------- 103

Bindheimite...........--.--_..---..-......----.................--.. 103

XV. Sulphates and tellurites --..---....-------.-.--.-...-....-.-.--...--. 104

Gypsum ........................................................... 104

Brochantite..._.........-...-.-1 ............................. 1........ 104

Antlerite ...._.........-....-...- ................... ................. 105

Pisanite _......................----.........--...................... 105

Picrallamogene....-........--.----.-.-....----.---.......--...--.. 105

Halotrichite ..................^.................................... 106

Alunogen...................-......................'................. 106

Copiapite ............................................................ 106

Knoxvillite ....................................................... 107

Redingtonite ---_......-.....-..--...................._............. 107

Alunite...----....--.--.....------.....-...._-- .--.-...........-.. 108

Jarosite ..............:............................................ 108

Natrojarosite...................................................... 109

Plumbojarosite..-.....--..--.-.----..._........................... 109

Emmonsite.........-.....-...--.--.-.-.-------.-.--.....-----....--.. 110

XVI. Molybdates, tungstates, and iiranates .:.-..-.--.-.........._..._... 110

Powellite..._--..--..._.-.---.....___-..___._._______.__..__._.____ 110

Hiibnerite........_................................................. 110

Qraninite-..___.................._..................._..............._ . Ill

Index ------.-.._.---------...---.---.-...--..-..-.-......_.......... .... 115
LETTER OF TRANSMITTAL.

DEPARTMENT OF THE INTERIOR, 

UNITED STATES GEOLOGICAL SURVEY,

Washington, D. C., October 8,1903.

SIR: I have the honor to transmit herewith a paper entitled "Mineral Analyses from the Laboratories of the United States Geological 

Survey; 1880-1903, tabulated by F. W. Clarke, Chief Chemist." Much 

of the material of this paper is unpublished, and it is very desirable 

that the whole should be printed in a conveniently accessible form. 

Very respectfully,

GEORGE F. BECKER,

Geologist in Charge,

Division of Physical and Chemical Research. 

Hon. CHARLES D. WALCOTT,

Director United States Q-eological Survey.

7

MINERAL ANALYSES FROM LABORATORIES OF UNITED 

STATES GEOLOGICAL SURVEY, 1880-1903.

Tabulated by F. W. CLARKE, Chief Chemist.

INTRODUCTION.

In the present bulletin I have brought together and classified 507 

analyses of minerals from the laboratory records of the United States 

Geological Survey. A large proportion of these analyses have been 

already published elsewhere, but they are so scattered that their collection in one place seemed to be desirable. Over 150 distinct species 

are represented, and among them a considerable number were originally described by chemists connected with the Survey. These species 

are josephinite, cuprobismutite, warrenite, guitermanite, elpasolite, 

zunyite, ptilolite, hydronephelite, lucasite, antlerite, knoxvillite, 

redingtonite, pliimbojarosite, emmonsite, and powellite. In other 

cases minerals which were imperfectly described have been more 

sharply characterized and their true composition made known. 

Natrojarosite, for example, is here definitely recognized as a species.

In general the order of Dana's classification has been followed, but 

with some small variations. Thus the tellurides are put in a group 

by themselves, the borosilicates are brought together, while the phosphate's, vanadates, and arsenates are given as three separate classes. 

On purely chemical grounds these changes are warranted; on morphological grounds the usual mineralogical classification may be 

better.

Detailed descriptions of the various minerals have been purposely 

omitted. Neither are the analyses discussed. These deficiencies, 

however, are mitigated by the literature references to descriptions 

published elsewhere. Such references as '' annual report,''' 'bulletin," 

or "monograph" relate to the regular publications of this Survey; 

all other references are easily recognizable.
10 MINERAL ANALYSES BY U. S. &EOL. SURVEY. [BULL.220.

I. NATIVE ELEMENTS. 

GOLD.

From Persia; exact locality unknown. Analyzed by Charles 

Catlett.

Au -.___-.,_____._____.---_.....'......._.........._.......... 93.24

Ag.... . ....... ...... . .........-......... 6.65

Fe --.._.__.___.___._..._...-...__..-....--._.-..:...--. .11

Cu-- __ -- - _ _ - ...___ _.. . _ none

100.00"

JOSEPHINITE.

A nickel-iron alloy found in placer gravels in Jacksqn and Josephine 

counties, Oreg. Described as a new species by W. H. Melville, Am. 

Jour. Sci., 3d ser., vol. 43, 1892, p. 509. Waterworn pebbles. Specific gravity, 6.204.

~Ni................................. ................ .---...----- 60.45

Co _...._.-__ ..__.-___._- -_- ---.-----.- - .55

Fe ....................-.................-...... ..... 23.22

Pyrrhotite. ...-... .--.. .- .... ............'......

Chromite - - ..... ....---- .---- --.-------.----

Magnetite ._ _--..- ,-- - - -- 

Cu.............. ...... ....-......- -..-....- --.

As --------------------- .- --'-- - - - .-- 

01............ ...... . . ............... ....- ..

Silicates (anhydrous) . .......... ....... ......-. ---. 12.26

H80 below 100° __.-...__.-------------------- .81

H.2O above 100° ...-..............--...-..-....-----..--.- 1.12

Volatile matter ___ .___ _.- --.--- . - --.- ..- . .70 

CO2 ------------------------------------------ -..----_---.-- trace

.55 

.12

.50 

.23

.04

100.55

The silicate admixture, including the water, amounts to 13.38 per 

cent, of which 12.88 per cent, soluble in hydrochloric acid, is serpentine. The insoluble portion may be bronzite. Analyses of the silicates are as follows:

SKV- - . - -.-- .- 

AloO»

FeA ------------------------------------------

NiO.CoO:. -- ---... .-. -.-..-.-..

CaO... ...... __-._.... .. ..-.. ---.

MgO :_.-. .. _..... .._.....---._. ...

Na2O. .. .....-....-. ._-.-..------

H2O above 100° ------------------- .- ...._-..-_

Total.

5.14

.33

2.08

.32

1.62

2.69

.08

1.12

13.38

Insoluble 

portion.

0.23

.03

.04

trace

.06

.14

.50

Soluble 

. portion.

4.91

.30

2.04

.32

1.56

2.55

.08

1.12

12.88

For analyses of nickel-iron of meteoric origin, see Bulletin 168.
CLABKE.] MINERAL ANALYSES BY U. S. &EOL. SURVEY. 11

II. SULPHIDES AND ARSENIDES.

BISMUTHINITB.

From the Rosario Mining District, Sinaloa, Mexico. Analysis by 

W. I-I. Melville. Described by him in Bulletin 90.

Bi.---.----------. ---- -.-..- -.-------- . 72.90

Pb .......................................................... 6.03

On.......................................................... 1.67

Fe .........................................................v- .35

S............-......................... .................... 18.11 : Quart/ ......:............................................... .63

99.69 

METACINNABARITE.

Crystallized material from. New Alrnaden, Cal. Analysis by W. H. 

Melville. Not free from admixtures.

Hg_.......................................................... 78.01

S... ---------------------.................... .............. 13.68

Fe ........................................................... .61

Co ---.---------------------.----------------.-----_--------- trace

Zn ................... ............. .. ...................... .90

Mn.......................................................... .15

CaCO8 .._ -...--...-....-..--.--...._...._-_..-..-....---. .71

Quartz -.-..-- -....-..--.-.---.----..--------..--....-..-..... 4.57

Organic matter....-----........'....................-........ .63

99.26

Another specimen of inetacinnabarite from Knoxville, Cal., gave 

Melville the following figures:

HgS '.........,........u..................................... 98.48

FeS......................................................... .69

SiOo..............'........................................... .71

99.88

The latter mineral was described by Melville and Liridgren. in 

Bulletin 61.

COVELLITE.

From the East Greyrock mine, Butte, Mont. Collected by G. W. 

Tower. Analysis by W. F. Hillebrand. Color, indigo-bine. Massive. Specific gravity, 4.76 at 26°.

Cu.......................................................... 66.06

S.. ......................................................... 33.87

Fe ......-..................................... ........._ .14

Insoluble___________________________________________________ .11

100.18
12 MIKEBAL ANALYSES BY U. S. &EOL. SUKVEY. [BULL. 220.

POLYDYMITE.

A massive ore from the mine of the Canadian Copper Company, 

Sudbury, district of Algoma, Ontario. Specific gravity, 4.541 ~ Analysis by Charles Catlett. Described by Clarke and Catlett in Am. Jour. 

Sci., 3d ser., vol. 37, 1889, p. 372. Composition nearly Ni8FeS5 .

A. Actual analysis.

B. Analysis corrected by deduction of quartz and chalcopyrite.

Ni ..........................................................

Pe. ................ ...................................

S.. ..................................................

Cu .........................................................

SiO,-.. .-.._' - .-- . _- -. . .

A.

41.96

15.57

40.80

.62

1.02

99.97

B.

43. 18

15. 47

41.35

100. 00

Another nickel-iron sulphide, from the Worthington mine, SauTt 

branch of the Canadian Pacific Railway, 25 miles.west of Sudbury, 

has been analyzed by W. F. Hillebrand. Grayish, with a cast of 

yellow. Not pyrrhotite. Possibly a mixture of polydymite and pyrite.

Fe ._._____.._.._..____.__.. ___._________.__.....______...__._ 38.86

Ni .......................................................... 4.57

Mn.......................................................... .10

S-..............................:............................. 45.11

SOg.......................................................... .95

C0a ............................................................ «1.49

CaO.......,........:...........-...........-..............-. 1.91

MgO ....................................................... .41

H2 0 at 105°.................................................. .55

Insoluble.-----.:.-..------.-------..--....-----------..--.---- 4.80

3.25

STROMEYERITE.

From the Silver King mine, Calico, San Bernardino County, Cal. 

Specific gravity, 6:28. Analysis by W. H. Melville. Described by 

Melville and Lindgren in Bulletin 61.

Ag........................................................... 53.96

Cu _._..______..._______'.__.__....___...__-_._....____......_ 28.68

Fe _._. . _____--._.______ __..-.___.____..-.-__-_-....__.-..... .26

S...........-....... ......... .........--......-.-.'.. . 15.51

Residue --.....---.....,.....--...-.-- ----.--..------.--------. 1.55

99.86

SULPHIDE OF SILVER, COPPER, AND ZINC. .

Massive, resembling bornite. Apparently homogeneous, but may 

be a mixture. Specific gravity, 5.407 at 20°. Analyzed by W. F.

"Calculated to saturate CaO.
OLAKKH.] SULPHIDES AND AKSENIDES. 13

Hillebrand and described in Bulletin 55. From the Gagnon mine, 

Butte, Mont.

Cu .....- ..._. ___... . :_ _ . 40.24

Ag.-.....-......-...-.-................... ^....."............... 21.80

Pb .........I...................... . .... .-........... 1.46

Zn ........................................................... 13.83

Fe .......................................................... 1.98

S............................... ^...........................'. 20.88.

99.19 

LOLLINGITE.

From .Teocalli Mountain, Brush Creek, Gunnison County, Colo. 

Specific gravity, 7.400 at 14.5°, corrected for impurity. Analyzed by 

"W. F. Hillebrand and described in Bulletin 20.

A^...................:.....-....-----.-- - 71.18

S........................................................... .56

BL.......................................................... ' .08

Cu _. ____"_._ .. . . ..... .39

Fe ........................ ...................._.......... 22.96

Co --..--_----------------------------------------.- -------- 4.37

Ni... .. .... --. --..........'....................' .21

99.75

A doubtful arsenide of nickel and cobalt has also been examined 

by Hillebrand and described in Proc. Colorado Sci. Soc., vol. 3, pt. 1, 

p. 46. From the Rose mine, Grant County, N". Mex. Specific gravity, 

6.644 at 20°. Probably a mixture. Ni: Co=3:l, approximately.

As ----... ,.---- -- .---..--- --.----.- 74.04

S.......... ................................................. .13

Ag-..--.- ----.-----.-.-----.- .- --- ---...-.-------..-- 4.78

Cu.. ..---- - - -.-. .....-......_.- .04

Pb ..-- - -.. ..- --.-- - -- -- . ... .. .03

Fe .--.--.. . _. ...__.___ .............. .44

Ni, Co...... .....-. ., _ ..._ _.. ___ 19.52

CaO. ._ - .-.. . ._.. _. _. ._._.__ __ _ .09

MgO .._.._... ....-.-, .__._,. __ . _ .05

99.12 

ENARGITE.

From, the Rarus mine, Butte, Mont. Collected by G. W. Tower. 

Analysis by W. F. Hillebrand.

Cu................ I..................:..........:.-.........- 48.67

Fe .................... ...................................... .33

Zn ...j..................................................... .10

AS .....:............:......................:................ i7.9i

Sb I.......................................................... 1.76

S......... .--. -.-. .. _ .... .._ _. .._ 31.44

Insoluble ..-...........,.......................:............ .11

100.32
14 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BUM,. 280. 

CUPROBISMUTITE.

New species, discovered by W. F. Hillebrand and described by 

him in Bulletin 20. Named by l)ana. Specific gravity, 6.680 at 15°, 

corrected for impurities. From the Missouri mine, Halls Valley, Park 

County, Colo. Analyses, by Hillebrand, of three different samples.

Bi ............ .---.-.......-..-.-.--....-'....

As

Gn...... .......................................

Fb_. .......... .'........... ....'.................

Fe

Zn.. .................... ........................

s ...............:......_.......................

I.

60. 74

.89

15.96

2.13

.10

« 19. 94

99. 76

II.

63.36

4.09

12.65

.59

.07

« 18. 83

99.59

III.

62.45

9.89

6.68

2 74

.10

.07

17.90

99. 83

« Calculated.

ZINKENITE.

From the Brobdignag mine, Red Mountain, San Juan County, Colo. 

Specific gravity, 5.21 at 18°. Analyzed by W. F. Hillebrand and 

described by him in Bulletin 20.

Sb --------.--..- -----.----------- -------..

As .....--.. ---------------_.-._-..-...._'..______ .

Pb. ............... .

Cu.........- ... :-. ..... ........... .............. ..

Ag......... ..............................................

Fe

CaO............................... ......... ............ ..

S_. .......................................................

Gangxie ..................................................

I.

35.00

5.64

32.77

1.20

.23

.02

.31

.45

. 22.50

.59

98.71

II.

% f^Q

32.79

22.50

WARRENITE.

New species, described by L. G. Eakins in Am. Jour. Sci., 3d ser., 

vol. 36, 1888, p. 450. From the Domingo mine, Gunnison County, 

Colo. Occurs in matted, fibrous masses, known locally as "mineral 

wool." Analysis by Eakins.
CLAtlKM.] SULPHIDES AND ARSENIDES. 15

Pb -..-... .-.-.-----.-I--------- ------------------------- 39.33

Sb_ - ,. . - - .. . -- - . 36.34 

S..--------------------------------------------------------- 21-19

Ag _--.---_-.-_-.-..._-----.-------.--.--------- trace

Fe .... _. ....... . .. .. - - . - 1.77

Mil...---..--..-----.----.--------.--------------------------- trace

Insoluble..............-.-------........--------.------------ .52

99.15 

COSALITE.

From the Comstock mine, near Parfott City, La Plata County, Colo. 

Described by W. F. Hillebrand in Bulletin 20.

Bi............-.-.-.-.---------.------------------.----.----- 42.93 . Ag.......................................................... 8.43'

Cu_...--...---------.- ------------------------- 7.50

Pb...... .............................. ---------------- 22.49

Fe ...........................:. . . . . . .70

Zn ......... i....-.-.-..-..---------.----.-------------------- trace

S-.................................................. ........ 17.11

99.16 

FKEIESLEBENITE.

From Augusta Mountain, Gunnison County, Colo. Known locally 

as " mineral wool." Remarkable for its freedom from silver. Anatyzed by L. G. Eakins and described by him in Am. Jour. Sci., 3d 

ser., vol. 36, 1888, p. 452.

Pb........... ...-.............-..... ...-...-------. - 55.52

Sb ...........-.-......-.-.------..--..-----------------..-- 25.99

S (calculated") ... .......................................... 18.98

Ag --.------_------.---_-.-,-------------------------------- trace

Fe ------------ .----.--.---.------.--...----. .---------.--.- trace

Zn----_._..........-----..--------...------------------------ trace

100.49

GUITERMANITE.

New species, discovered by W. F. Hillebrand and described by 

him in Bulletin 20. From the Zuiii mine, Anvil Mountain, near 

Silverton, San Juan County, Colo. Forms the matrix of zunyite. 

Corrected specific gravity, 5.94 at 17.5°. Analyses by Hillebrand.

Admixed zunyite - ....-.- .---. ....--.-........----........

As.............................................:.........

Pb................................ ....................

On..... ........... ......... "...... .............. ....

A.S.

Y&. .............................. .....1.. ................

^.... ....................................................

O... .................................................

I.

1.77

13. 40

63.60

.17

.02

.43

19.67

99.06

II.

3.82

13.00

61.63

.17

.02

.88

19.56

.55

99.63
16 MINERAL ANALYSES BY U. S. QEOL. SURVEY. [BULL. 220.

III. TELLTJRIDES.

HESSITE.

From San Sebastian, Jalisco, Mexico. Specific gravity, 8.24 at 26 C 

Analysis by W. F. Hillebrand.

Ag.........._......... t _...._______..._.__..._..._--:..-..... 61.16

Te .............................. r ........................... 36.11

Pb ........................................................... 1.90

S, Fe, Zn.---..-.----..-........................----_..-.--.. undet.

99.17

PETZITE.

From, the Norwegian mine, Calaveras County, Cal. Collected by 

F. L. Ransome. Specific gravity, 8.925 at 23°. Analysis by W. F. 

Hillebrand. Formula, Au2Te. 3 Ag2Te.

Ag.................... ...... ................................ 41.87

ATI.......................................................... 25.16

Te--.......................................................... 33.21

Se. '. ---..._---_._._.-_.._ ..._____ ..._.____.__..-._-._-.._--.__.. trace

Mo....-.-.._-- ... -,---._...__:.--------.----------..... .08

100.32

CALAVERITE.

From Cripple Creek, Colo. Collected by R. A. F. Penrose, jr. 

Analyzed by W. F. Hillebrand and described by him in Bulletin 167.

A. From the Prince Albert mine. Corrected specific gravity, 9.0 

at 24°.

B. Raven mine.

C. C. O. D. mine.

Te.._.........._._..._.........__ ..........

An.........................'..............::....

Ag ...................

Insoluble matter -.....-.--....--._.....-.-.-...

Fe2 03 ....................................I.-.-.

Fe. .. .. ..........................

S ... .-.- ---- --- -- ---

Mn .............................._.............

Ca -.-..---.--- .......:.......................--

Mg ___...-..-.- . -- -- - .-:- 

O, F , and soluble SiO2 by difference -...-...--...

A.

57.27

38. 95

3.21

.33

.12

99.88

B.

47.69

33.93

1 47

5.80

5.41

06.17

100.47

C

53.89

39.31

.85

.91

1.67

1.58

&.S3

.51

.10

.95

100.00

Calculated from Fe to make FeS2. Z>AsMnOa ?
CLARKE.] TELLURIDES, CHLORIDES, AND FLUORIDES. 17

MELONITE.

From the Melones mine, Carson Hill, Calaveras County, Cal. Collected by F. L. Ransorne. Analyzed by W. F. Hillebrand and 

described by him in Bulletin 167. Three samples. Specific gravity 

of B, 7.72 at 22.5°, which is probably too high for the pure NiTe2 . 

Sample C is the purest.

A. B. C.

Te. 

Ni. 

Co. 

Ag.

75.29

15.71

77.72

17.16

.10

5.09

99.44 100.07

80.75

18.31

99.92

IT. CHLORIDES AND FLUOKIDES.

HALITE.

Rock salt from Salton, Cal. Analysis by E. T. Alien.

Nad.-..-...--.---.-...........-.--......-........:........'. 94.54

KC1......................................................... .31

Na2S04 ._.................................................... 3.53 -

CaSO42H2O................................................... .79

Moisture __.-.---_..-_._.....__..----.______..._..___________ .14

Insoluble residue ....---.---....._............................ .50

99.81 

EMBOLITE.

From Broken Hill, Australia. Analysis by L. &. Eakins.

AgCl................................. ...................... 59.97

AgBr....................................................... 39.22

H20......................................................... .63

99.82 

CRYOLITE.

From St. Peters Dome, Pikes Peak district, Colorado. Described 

by Cross and Hillebrand in Bulletin 20. Massive. Pinkish in color. 

Specific gravity, 2.972 at 24°. Analysis by W. F. Hillebrand.

AL......................................................... 12.81

Na........................................................... 32.40

Ca ........................................................ .28

F .......................................................... 53.55

Fe,O3 -------------------------------------------------------- .40

HSO..-........_.....__.:.... .._....._.. .___.____.__.___._. .30

99.74

Bull. 220 Oi
18 MINERAL ANALYSES BY U. S. GEOL. SUEVEY. [BULL.220.

PACHNOLITE.

From St. Peters Dome, Pikes Peak district, Colorado. Described 

by Cross and Hillebrand in Bulletin 20. Analyses by W. F. Hillebrand.

A. Compact bluish variety. Specific gravity, 2.980 at 22°.

B. Crystalline coating.

C. Fresh, transparent, crystalline material.

D. Carefully selected crystals. Specific gravity, 2.965 at 17°; 2.962 

at 22°.

Al. ................

Ca. .......... . .

Mg ................

Na. ................

K

H20_. ...............

F. ............. ....

A.

11.94

19.32

.13

10. 43

7.87, 7.95

B.

. 12.93, 12.92

15.27, 15.17

1.53

10.28

.13

8.64, 8.79

C.

12.14

18.06

10.23

8.10, 8.11

51.33, 51.28

99.86

D.

12.27

18.04

10.25

8.05

« 51. 39

100. 00

a By difference. 

ELPASOLITE.

From St. Peters Dome, Pikes Peak district, Colorado: Described 

as a new species by Cross and Hillebrand in Bulletin 20. Incomplete 

analysis on insufficient material, by W. F. Hillebrand. The fluorine 

was deduced by calculation on the assumption that the metals are 

fully combined with it.

Al -------:.------.---...._... .._.__....... 11.32

Ca ._..............................-_...---........ ......--- - .72

Mg._._._.-.... ...-_._--._-.--.-.-.-.-.---.------- ------ .22

K........................................................... 28.94

Na-..._.__-._-..-.-..__----------.------------ --------.- 9.90-

F __.__ __ _.._.,-_.__._.. .;--_..----------.---------------. 46.98

GEARKSUTITE.

From St. Peters Dome, Pikes Peak district, Colorado. Described 

by Cross and Hillebrand in Bulletin 20. Analysis by W. F. Hillebrand.

Al........................................- .........-.... 15.20

Ca -.......................-.---.-...-.-.----------------. 22.30

Na-....... --._..-.-.---------------------- ------ .10

K .........:.........._...........................:......... .04

H,0-...- .-..- ---.-..---.----.------.---.--- 15.46

F ..............-..........--.....-..-.-----..-..-.-.--.. 42.07

Oxygen (loss)

95.17

4.83

100.00
CJLABKE.] CHLOB1DES AND FLUOBIDES. 

PROSOPITE.

19

Two samples of prosopite have been analyzed by W. F. Hillebrand, 

as follows :

A. From St. Peters Dome, Pikes Peak district, Colorado. Described 

by Cross and Hillebrand in Bulletin 20. Specific gravity, 2.880 at 23°. 

Mean of four analyses.

B. Pale green, massive variety, from the Dugway mining district, 

Tooele County, Utah. Specific gravity, 2.87 at 21°. Described by 

Hillebrand in Bulletin 167.

Al -.-----------...--..-...------..----..-..-----,....--....

Ca '

Mg ......................................................

K

Na._ __.__'...._.__._._. ... . _ _____ i--...

Cu_. ..._._ _______;__.____..____________._ ...._.:.._ __.^v.

F - ......

H2O ----..

A.

22 02

17.28

.17

.48

33.-18

13.46

86.59 

13.41

100. 00

B.

20.08

17.55

12

.32

.17

28.00

 14 -34

80. 48 

« 19. 52

100.00

«Including a little quartz; undetermined. 

TYSONITE.

From Cheyenne Mountain, near Pikes Peak, Colorado. Analyzed 

by W. F. Hillebrand and described by him in Bulletin 167. Corrected specific gravity, 6.14 at 28°.

Ce2O3 (includes 0.13 ThO2 ?)... ........................ ^..... 42.89

La2O3 group (at. wt. 139.7) _..............................--... 39. 31

F ..-...-...........-.-.--.-.-.--.-----.-...-.--..-.-------. 28.71

......_-..--..-.....-....-..-...--..----...-.---- .53

......_.._............. ............................ .18

.............................. ....-..--.--..-.. .30

K2O and Li2O ----.--- ._---..-------.-------...---.------------ traces

Fe,O, ......................._.........;_......-....... .. .11

CO2 .. 

CaO-. 

Na2O.

Less O equivalent to F.

112.,03

12.08

).95
20 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL.220.

V. OXIDES ANT) HYDROXIDES.

SPINEL.

Variety pleonaste. Separated from a pyroxenite found between 

South Meadow and Moore creeks, Madison County, Mont. Rock 

described by Merrill in. Proc. U. S. Nat. Mus., vol. 17, p. 659. Specific 

gravity of spinel, 3.89 at 32°.3: Analysis by L. G-. Eakins.

A12O3 --. -----------------------------------------------..-.-- 62.09

FeO--._ .............................................^...... 17.56

MgO-__-._.-..__-.__ .---.___..__..__.-_---_.....____________ 15.61

OA----- .--.-.---__...-._.......:...._....-.-....-.......... 2.62

Fe2O3 ..-..........._...................... .--.._-.-..__.___.. 2.10

MnO .....-.....--.-................^....................... trace

CaO..........-..-_-........................................ .16

SiO......................................................... .55

100.69 

GAHNITE.

From Gilmqre's-mica mine, Montgomery County, Md., about 12 miles 

north of Washington, D. C. Color, bottle-green. Specific gravity, 

4.59. Analyzed by T. M. Chatard and described by him in Bulletin 9.

A12O3 .______ ____--__.__.___.._ ______.-...__...____,_.__.____ 55.46

FeA------------------------------------------------------- 2.77

ZnO-------------. ---- --..--.---------_- --_--__.___- 40.07

MgO ...................................................... .59

CuO ---__.-----_- __---___--__-_----_- --.------------....... undet.

SiO^.-------------------..----------..-.-----.----.------...- .57

Ignition --_-.-..-_--.-____.--_----_.--.-..........._........ .30

"99.76 . 

MAGNETITE.

From the Gallatin Bange, between Middle and Bozeman creeks, 

near Bozeman, Mont. Analysis by T. M. Chatard.

Insoluble ...........].................... .................... 0.16

FejA- _. ._;_____.__._...___._.___.____._..________ ___ _______ 96.70

A12O3 ------------------------------------------------------ .04

MnO ..................................................... .93

CaO..------.--___-----___-----.--_-------...._.:..--.._... trace

MgO ............_....._...!............. .................. .07

TiO2 ............._-..........-............................. 2.71

PA------------------------------------------------------- .012

B................. ......................................... .171

100.793 

Less O equivalent to S..............,._....... .._ __........ .06

100? 733
CLABKE.] _ OXIDES AND HYDEOXIDES. 21

CHBOMITB.

From Corundum .Hill, North Carolina. Ana-lysis by T. M. Chatard. 

Fe2 03 not separately determined.

Cr2 03 ------------------------------------------------------ 45.94

FeO-_-.-..-.. -.---_.-.-_._--.--_-_..-.--- -....---___-.-.. 42.90

ALA--------------. ----------------- --------------- 2.51

MnO ........................................................ .84

NiO.CoO.--.-_.--.-..--..._..-.--_-.-,--.-.---.----..-_.. .16

CaO......................................................... 1.40

MgO....................................................... 2.81

CuO.--.---.---. ---..---.-----_---...-.----.-.-------....-- .40

SiO2 ..--_--.--.----_..-_...--.-.:.--....------.-..-_ .---.. 3.20

TiO,..................................... ................ .36

PA -- .-- - - -- -- ----------__.13

100.64 

BUTILE.

From near St. Peters Dome, Pikes Peak district, Colorado. Specific gravity, 4.288 at 19°. Analysis by L. G. Eakins.

Ti02 ............-............. ........................... 94.93

FeO......................................................... 3.77

SO,,- ----.------ --- -.-.------------------- ...-.-- 1.37

H2O.. _:...__-....__._____..-....--...-....-__.._._.._.. -.71

100.78 

DIASPORE.

From Mount' Robinson, Custer County, Colo. Analysis by L. G. 

Eakins. .

A12O3 ......................................................... 83.97

HaO...-.....-.....---........ -. -- ---- .------ 15.43

99.40

BAUXITE.

Two samples from Jacksonville, Calhoun County, Alai Alkalies, 

liine, and magnesia not looked for. Analyses by W. F. Hillebrand.

Bed. White.

A12O3 .............

FeA ..........

HjOatlOO0 .....

H2O by ignition 

SiO, ...........

TiOa ...........

PA

41.00

25.25

.65

20.43

10.25

2.53

trace

100.11

48.92

2.14

.45

23.41

21.08 

2.52

trace

98.52
22 MINERAL ANALYSES BY U. 8. GEOL. SURVEY. [BULL. 220.

BRTJCITE.

From Texas, Lancaster County, Pa. Analysis by E. A. Schneider:

MgO ......................................................... 67.97

MnO:. .............^.........:^............................ .97

Fe2O3 . -..-.--...-...._----..-................................... .39

HjOatl050 -...-.-..._-..'...-.-.___-_..._.-.__._.._...I....... .18

H2O, ignition .....'......................:.....'............... 30.63

. 100.14 

PSILOMELANE.

From a prospect hole on plain south, of Round Mountain, Silver 

Cliff, Colo. Analysis by W. F. Hillebrand. There were strong spectroscopic reactions for strontia and lithia, but these bases were not 

estimated. A little insoluble gangue is included with the silica.

MnO., ......'................................................... 76.18

MnO ................. ...:....'......'.....:................... 5.71

H,0 below 130°..........i........,..........'................. 1.41

H2O above 120° ..____._..___:__ ........................... ._' 3.94

AlfO,....'................................ .-.-...--........ ... 1.81

Fe2O3 --------------------------------------------------------- -34

CoO..................... .___-..__.--__.__-_-.__--_. ........ trace

ZnO......'................ ................................... 2.80

CaO .............^............................ ^.............^ .83

MgO ..I.............................'.......'................... .29

K,O.......-.-... ....:..'..-....'...........--.---...-.....-.... 3.46

Na?0.- .........:......'.................:...... .............. .81

SbA ........................... ---------------.......... .12

Si02 ..._................ ..................:.....!............ 2.30

100.00
CtiAItKK.l MINEKAL ANALYSES BY U. S. GEOL. SURVEY. 23

VI. CARBONATES.

DOLOMITE.

A. Dolomite 'marble, New York Quarry Company, Tuckakoe, 

Westchester County, N. Y. Analysis by W. F. Hillebrancl.

B. Dolomite marble, Cockeysville, Md. Analysis by J. E. Whitfield.

C. Same as B. Analysis by E. A. Schneider. Another sample.

D. Dolomite marble, Webster, Mass. Analysis by H. N". Stokes.

E. Pink, crystallized dolomite, Joplin, Mo. Analysis by E. T. 

Alien.

Insoluble. .........................

sio,._.,._ -.-.- - - -.-

A1A -----------------------------

FeA ..............................

FeO... ......... ;------.-------- .-

MnO... --------..---.-.- ----

MgO. .. 1. ........ ..................

CaO. -._--------.-----------------..

CO, .... . ........

H2 0_-_. .--.--. ---.------.---...-...

K,O. .-.:.-----. -.-... --..----- 

Na.O.. _../..-..-...._......-.. 

PoO. - - ......

TiO.2 . ..............................

S .........-..--..--...-..-.-..---.-.

A.

0.62

.71

} .«

20.71

30.68

46. 66

.16

99.75

B.

0.44

1.22

trace

20.87

30.73-

45.85

1.22

100.33

C.

5.57

| .40

20.30

29.08

44.26

99.61

D.

1.01

.17

none

.37

.08

21.35

30.82

45.84

.09

.10

.01

.06

trace

trace

99. 90

E.

0.90

.06

19.65

32.05

46.82

.48

99.96

SMITHSONITE.

From Marion County, Ark. Bright .yellow variety, known, locally 

as "turkey-fat ore." Analysis by H. N. Stokes.

Si02 ------.--. .............. ................................. 0.06

ZnO.-l. ....... ....... -...-.-...---.-.......'.-.............. 64.12

CdO ---------'..--------.----------.--..-,----.------......._. .63

CdS 

CO, 

CuO - 

FeO 

CaO

.25 

34:68 

trace 

- .14

.38

100.26
MINERAL ANALYSES BY U. S. GEOL. SURVEY. lBui^.220.

BASTNASITE.

Associated with the tysonite of Cheyenne Mountain, near Pikes 

Peak, Colorado. Specific gravity, 5.12 at 27°. Analyzed by W. F. 

Hillebrand and described by him in Bulletin 167.

Ce2O3 ----------.-----------.--.-----------------------------«37.71

La2O3 group .....1.......................................... 36.29

Fe2O3 ------------------------------------------------------- -22

C02 .........._...._.._..:..--.---..--..----..-...._-:-.. 20.03

 Na^O....................................................... .18

Z20, Li2 0 ,--------------_..----.----------.--------------.. traces

H2O..............................-................:......... .08 '

F .........^................................................ 7.83

O equivalent to F.

102.34

3.30

99.04

URAO.

Deposited from the waters of Owens Lake, California. Analyses 

by T. M. Chatard. Described by Chatard in Bulletin 60. Five samples analyzed, as follows:

A. The best material. Specific gravity, 2.1473 at 21.7°.

B. Crude urao.

C. Urao deposited upon a grass root.

D. From a small lagoon.

E. From a vat dug on the beach of Owens Lake.

Insoluble, inorganic. ................

Insohible. organic ...................

SiOj,. ...... ._--,-.-..-...-.-....---.._-

Cl ...................................

SO, --.---.. -..---...---....-...-

CO2 ................................

Na^O. ..............................

KjO... .............................

CaO.. .......:......................

MgO......'....,.... ..............

H2O. ....

O equivalent to Cl .---..-....-......

A. '

0.02

.19

.70

38.13

41.00

20.07

100. 11 

.04

100. 07

B.

0.22

.10

1.57

.79

37.00

41.26

19.62

100. 56

OK

100. 21

C.

2.92.

.14

.05

2.73

.76

35.24

40.22

18.31

100.37

£H

99.76

D.

0.40

.12

.09

.21

.63

37. 50

40.08

trace

.06

.02

19.94

99.05 

.05

99.00

E.

4.10

.27

.04

1.83

.84

35.10

39.36

18.58

100. 12 

.41

99.71

a Includes 0.10 ThO3.
CLARKE.] MINERAL ANALYSES BY U. S. GEOL. SURVEY. 25

VII. SILICATES.

PETALITE.

From Peru, Me., associated with spodumene. Analysis by F. W. 

Clarke.

Ignition ...............-......-....--.-...---.-.-- .-.--._... 1.03

SiO2 ....-...._.-.._-..-..-.-----.--..---------------------.- 77.29

A12O3 ------------------------------------------------------- 16 - 95

Fe2 03 -.--.._ ....I.----------.--------....-------------------- trace

MnO ____-_......._--.-.-------------------------..---------. trace

Li2O---............ ................................r........' 2.62

Na2O._.................. ................................... 2.39

K,O .--.____---._._-_-.----.------^ ------------------------- trace

100.28

ORTHOCLASE AND MICROCLINE.

A. Orthoclase from Silver City, Idaho.- Occurs as a gangue mineral. 

Partial analysis by W. F. Hillebrand.

B. Orthoclase from Mitchell County, N. C. Large cleavage mass. 

Analysis'by E. T. Alien.

C. Feldspar crystal from the nevadite of Chalk Mountain, Summit 

County, Colo. Analysis by W. F. Hillebrand.

D. Pink orthoclase crystals, from gray porphyry, Johnson Gulch, 

near Leadville, Colo. Described by Cross in Monograph XII, Appendix A. Analysis by W. F. Hillebrand.

E. Feldspar separated from gabbro. East side of North Fowl 

Lake, Minnesota. Analysis by W. F. Hillebrand.

F. Feldspar from the elseolite-syenite of Litchfield, Me. Described 

by Bayley in Bulletin 150, p. 201. Analysis by W. H. Melville.

Si02 ........................

TiO2 .........................

A1A -----------------------

Fe2O,t ......... ..............

FeO... .......................

MnO....-------.........-...

CaO ........................

SrO. .........................

MeO

NasO...... ...................

K2 (X. .......................

Li2O .........................

H2 0at 100°....-.......-.-...

H2O above 100°... ............

A.

66.28

17. 93

.25

15. 12

99. 58

B.

65.09

18.95

| .36

42

2.29

12.95

100. 06

C.

65.04

20.40

.79.

none

4.11

9.74

trace

1 .29

100. 37

D.

62.22

20.33

2 95

3.45

8.31

I 1.90

99.16

E.

62. 71

trace

19.20

1.08

.93

trace

.44

.81

2.96

10.41

.23

92

99.69

F.

65. 14

18. 19

.25

.33

.16

1.68

14.14

1

\ - 1?

 100.06
26 MINERAL ANALYSES BY TJ. S. GEOL. SURVEY. [BULL. 220.

G. Flesh-colored microcline from the pegmatite of Jones Falls, Baltimore, Md.

H. Greenish microcline, same locality as G. G and H described by 

S. L. Powell in Johns Hopkins Univ. Circular, vol. 12, p. 49. Analyses by W. F. .Hillebrand.

I. Anorthoclase from the elseolite-syenite of Peaked Butte, Crazy 

Mountains", Montana. See Wolff and Tarr in Bull. Mus. Comp. Zool., 

Harvard Coll., vol. 16, No. 12, 1893. Analysis by W. F. Hillebrand.

J. Anorthoclase from red soda-granite, Pigeon Point, Minnesota. 

Described by Bayley in Bulletin 109. Analysis by J. E. Whitfield.

K. Anorthoclase from keratophyre, Marblehead Neck, Massachusetts. Described \>y Sears, Bull. Mus. Comp. Zool., Harvard Coll., 

vol. 16, No. 9, 1893. Analysis by T. M. Chatard.

SiO2 .................................

A1A --- ..--.- - -

Fe2O3 ...............................

FeO _..._...___.______.__;_.__.____

MnO. .............. .................

MgO.... ...........................

CaO :._.._............._..._

SrO...... ..........................

BaO ........ ......................

E,O-_--.. ..........................

Na2O ..... ..........^... ..........

Li2O _-.-._._._.-._._<_--._....__-_.'-

H2 0 at 100°. ..'.... ............ ......

H2 0 above 100°. ...... ..............

G.

65.06

18.41

trace

.04

.26

trace

.13

 14.30

1.60

.04

.26

100.10

H.

68.48

16.11

.20

.17

.03

.23

.05

12.99

1 27

.06

.26

99.85

I.

62.31

22.63

.63

.57

' 4.79

7.68

.16

.72

100. 26

J.

65.00

18.22

2.64

.06

1.06

4.18

8.40

}.. - 46

100. 02

K.

65.66

20.05

trace

trace

.13

.18

.67

6.56

6.98

. .04

.37

100. 64

ALBITE.

A. From feldspathic schist, central shaft of the Hoosac Tunnel, 

Berkshire County, Mass. Described by Wolff in Monograph XXIII, 

pp. 60-187. Analysis by R. B. Riggs.

B, C. From the porphyritic mica-schist of Greylock Mountain, 

Massachusetts. Described by "Wolff, loc. cit. Analyses by R. B. 

Riggs.

D. From the clseolite-syenite of Litchfield, Me. Described by 

Bayley in Bulletin 150, p. 201. Specific gravity, 2.622. Analysis by 

W. H. Melville.

E. From the pegmatite of Jones Falls, Baltimore, Md. Described 

by S. L. Powell in Johns Hopkins Univ. Circular, vol. 12, p. 49. 

Analysis by W. F. Hillebrand.
CLARKE.] SILICATES. 27

SiOj, ....... ....................

A1A--- ----------- --------------

FeA ..............................I

FeO_. ..............................

MgO-. .............................

CaO...................... '..........

SrO.. .-- . -- . ..... 

Na.O. ..............................

K»O...... ............ .....,:..... -.

Li.O ..............................

MnO... ----------------------------

H2O below 100° ....... ._._.__.._ _...

H2O above 100°.. ....................

A.

69.69

 » 18.60

'.20

trace

10.28

.40

i .42

99.59

B.

68.08

> 20. 11

CO

trace

11.00

.36

trace

V I >dl SI 

99.86

C.

67.83

-> 19.92

(?)

trace

11.65

.25

trace

) 12 / - u

99.77

D.

68.28

19. 62

..23

.09

.31

10.81

.39

| .09

99.82

E.

63.72

| 22. 26

.00

3.58

trace

8.98

.76

trace

.09

.43

99.88

ANORTHITE.

A. From Baymond, Me. Associated with, idocrase, garnet, pyroxene, 

and scapolite. Analysis by W. H. Melville.

B. From Phippsburg, Me. Occurrence similar to A. Incomplete 

analysis by George Steiger.

C. Separated from "hyperite changing to diorite," near Whitaker's 

ore pit, Wilmington, Del. Described by Chester in Bulletin 59. 

Analysis by R. B. Riggs.

SiO2 _ ---------------.--.------------------.----

Al O

Fe,O8 -------------------------------- .... ------

FeO-..-----.--------~'- -- .----- - .-

MnO.------.-..----.----------------------.---.

CaO.----- .................................. ....

M.gQ.. .........................................

K2 0... ................... .....................

Na-jO-,-----------'--- -----------------

Li2O . .................. .............. i.. .

H2 0 at 100°. ........... ....... -....-...-....

H2O above 100° .................................

A.

43. 13

30.95

1.04

trace

trace

19.71

.31

1 29

.69

.22

2.80

100.14

B.

45.62

35.29

17. 31

98. 22

C. .

44.09

35.41

.51

18.47

.19

.99

I QK > .35

100.01
28 MINERAL ANALYSES BY U. 8. GEOL. SURVEY. [BULL. 220.

SODA-LIME FELDSPARS.

A. Transparent oligoclase, from Bakersville, N". C. Analysis by 

F. W. Clarke.

B. Feldspar separated from porphyrite; Sugar Loaf, northwest of 

Elk Mountain, Tenmile district, Summit County, Colo. Analysis by 

W. F. Hillebrand. Much altered.

C. Feldspar separated from andesite; mesa northwest of Parkdale, 

Colo. Analysis by W. F. Hillebrand.

D. Feldspar separated from gabbro; Brandy wine Creek, Wilmington, Del.' Specific gravity, 2.592-2.877. Described by Chester in 

Bulletin 59. Analysis by R. B. Riggs.

E. Feldspar separated from the gabbro of Ashland County, Wis. 

Analysis by W. F. Hillebrand.

F. Feldspar separated from diabase; near SE. corner of sec. 13, T. 

47 N"., R. 46 W., Michigan. Described by Van Hise in Monograph 

XIX. Analysis by T. M. Chatard.

SiOj...:....'. ..................

TiO., ................... -...

Al O

Fe2O3 -----------.. ------ -.

FeO.... .....................

CaO ........................

SrO. ........................

BaO ..............:.........

MgO.. ................... ..

MnO . ....................

Z20.. .......................

Na2 0. .........................

I4O ............ .....I......

P n

H,O.. .......................

A.

62. 92

25.32

trace

4.03

trace

.96

6.18

25

99.66

B.

' 62. 96

21.51

.32

4.00

.13

.30

1.60

6.15

trace

2.78

99.75

C.

63.02

-i 23. 05

3.39

trace

3.92

6.76

none

.26

100. 40

D.

70.37

18.36

^ .58

mndet.

5.08

.04

.63-

4.32

.45

99. 83

E.

53.30

trace

29.03

.55

.23

11.40

trace

trace

.13

.40

4.87

none

.23

100. 14

F.

51.18

27.00

i 3.19

/ undet.

11.70

1 Q9

.17

.41

3.48

1.19

100. 24

G, H. Feldspars separated from olivine-diabase; KE. £ sec. 13, T. 

45 N"., R, 1 W., Wisconsin. See Van Hise, Monograph XIX. Analyses by T. M. Chatard.

I. Feldspar from gabbro; southern half of sec. 14, T. 44 1ST., R. 4 

W., "Wisconsin. See Van Hise, loc. cit. Analysis by T. M. Chatard.

The following feldspars were separated from Minnesota gabbros for 

W. S. Bayley and analyzed by W. F. Hillebrand:
CLAKKTC.] SILICATES. 29

J. From average gabbro, south-quarter post, sec. 35, T. 61 N"., R. 

12 W.

K. From gabbro, NW. i of SE. £ sec. 23, T. 62 N., R. 10.

L. From gabbro, center of sec. 25, T. 64 N., R. 8.

M. From gabbro, Duluth and Iron Range Railroad.

N. 0. Two feldspars separated from the amphibolite of Palmer 

Center, Mass. Analyses by W. F. Hillebrand. Specific gravity of 

N, 2.667 at 24°; of 0, 2.677 at 22°. In N, calculation gives about 7.4 

and in 0 7.6 per cent of admixed quartz.

SiOa _._--.............- 

Al O

FQjOt... ............................

FeO---~~ :.- - -~ --------

MnO..--' . -------- .--..-----

CaO ..-...--.- 

Me-O

Na,0.--------- ------------------

K^>... ....................... ......

 H2D at 100°.. ....... . ...... .-... .

H.,0 above 100° -.____-__-.---.---.__

TiO2 _- -- . - -

Si02 --.-. ---------------------------

Al O

FeA .. .: ----- -

FeO. ..'. ----------------------------

CaO------ --------------------------

MffO

Na.,0- ---.- -----------------

K2O. ... -- - .. -- -.--. ------

HjO at 100°. -------..------.-- -

H2O above 100° .....................

TiO

MnO. ---- -------- ---..-

G.

61.65

19.91

2.28

undet.

trace

4.12

.61

4.74

5.72

\ .95

99.98

H.

56.15

26.05

1.98

undet.

.13

8.70

.54

4.79

1.56

.13

.64

100. 67

L.

52.61

29.80

 .57

.23

12.25

.20

3.80

.53

| .29

trace

trace

100. 28

I.

51.91

29. 35

}

1 9' 

1. /it

tract

12. 6(

.61

2.91

.2*

.01

.&

99. 6J

M.

53.45

29.77

.33

.15

11.33

.11

4.33

.68

1 .23

trace

100. 88

)

>r

]

 \

)

i

^

?

I

]

\

J.

51.89

29.68

. .32

.37

12.62

.38

3.87

.50

.07

.39

100.09

N.

62.91

23.37

trace

5.83

7.78

.20

' .42

100. 51

K.

52. 50

30.15

.47

.15

12.82

.10

3.72

.53

} .25

trace

100.69

0.

60.90

24.97

. trace

7.85

6.26

.16

} «

100. 62
30 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL, 220.

LEUCITE,

From Mount Vesuvius. A fine crystal. Analysis by George 

Steiger.

SKV-. ............................ .. ................ 55.40

A12O3 ------------------------------------------------------- 23.69

CaO -.---.------------------------------ ---:----.---- .16

K,O.---------,---.-.------------.-- ----- ----..- -- 19.54

-.....-.._.'....--._---.--.--..---_----------.._. 1.25

...................................................... .24

100.28

ENSTATITE.

A. Enstatite from Granville, Mass. Slightly altered. Described 

by Emerson in Monograph XXIX. Analysis by W. F. Hillebrand.

B. Enstatite separated from the San Emigdio meteorite, found in 

San Bernardino County, Cal. Analysis by J. E. Whitfield.

C. White, fibrous mineral, near enstatite, from seams in chrysolite 

rock, Corundum Hill, North Carolina.

D. Altered enstatite, Corundum Hill. Analyses C and I) by T. M. 

Chatard. (See Bulletin 42.) Specific gravity, 2.872.

E. Bronzite separated from the websterite of Hebbville, Md. Described by Williams in Am. Geologist, vol. 6, p. 35. Analysis -by 

T. M. Chatard.

SiO,.-. ..--.. -- -

TiO, ...............................

AI n

FeA .... ......i.... ............... .

FeO-.- -------------- -----

MnO. --------..----... ............

NiO.---. ...........................

Cr203 ................ ..... r ........

MgO. ..............................

CaO-----------------....-. ........

Alkalies. ......... ................

P n

pn

HaO at 100°.... .....................

H2O above 100° .....................

-

A.

54.04

none

.52

1.51

3.90

.11

.23

.14

34.40

.08

none

1.32

.70

3.07

100. 02

B.

54.42

14.03

29.11

2.46

100. 02

C.

56.39

none

2.31

.16

1.96

' 34.57

.04

.

| 4.32

99.75

D.

56.58

none

1.74

1.89

3.67

.21

.24

30.34

.59

.17

} 4.55

99.98

E.

54.53

1.93

1.70

8.92

.28

.30

29.51

2.25

j 1.14

100. 56
SILICATES. 31

HYPEESTHENE.

A. From the basalt of Mount Thielsen, Oregon. Incomplete analysis by T. M. Chatard.

B. From gabbro, SE. i sec. 20, T. 65 K, R. 4 W., Minnesota. 

Described by Bayley in Jour. Geol., vol. 3, p. 1. Analysis by E. A. 

Schneider.

C. From the augite-andesite of the Tokajer-Berg, Hungary. Analysis by W. F. Hillebrand. Specific gravity, 3.495 at 25°.

D, E, F. Three specimens separated from the hypersthene-andesite 

of the Buffalo Peaks, Colorado. Described by Cross in. Bulletin 1. 

Analyses by W. F. Hillebrand. In D and E alkalies were disregarded. 

In E and F all the iron is given as FeO. Specific gravity of F, 3.307 

at 23°. -

SiCV . ..............

T\d

Al O

FeA -----------------------

FeO.-.. .......... ...........

MnO...... ..................

MffO

Cab.. .- 

Na,0.... ....................

H2O at 100°.. ....--._.....-..

H2 0 above 100° ......_.......

A.

53.31

5.99

} 13.43

21.69

3.69

98.11

B.

48.44

rindet.

7.91

.33

20.88

.92

19.35

1.44

.08

none

99.35

C.

51.44

.73

.60

2.28

20.77

.88

19. 93

3.80

100. 43

D.

51.70

1.72

'.30

18.00

.36

25.09

2: 87

100. 04

E.

51.16

2.15

} 18.36

.36

24.25

3.81

100. 09

F.

50.04

2.91

} 17.81

12

21 74

6.70

27

99.59
32 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL.220.

PYROXENES.

A. Diopside separated from the websterite of Hebbville, Md. 

Described by G. H. Williams, Am. Geologist, vol. 6, p. 35. Analysis 

by t. M. Chatard.

B. Diopside from the leucite rocks of the Leucite Hills, Wyoming. 

Described by Cross, Am. Jour. Sci., 4th ser., vol. 4, p. 115. Specific 

gravity, 3.290 at 20°. Analysis by W. F. Hillebrand.

C. Pyroxene from Moriah, N. Y. The source of associated serpentine. Analysis by Charles Catlett.

D. Dark-gray pyroxene, Montville, N. J. The source of associated 

serpentine. Analysis by Charles Catlett.

E. Diallage from the gabbro of Ashland County, Wis. Analysis 

by W. F. Hillebrand. . , F. Jeifersonite from Franklin Furnace, N". J. Analyzed by W. F. 

Hillebrand and described by him in Bulletin 167.

Si02 ........................

Ti02 .........................

A1A .........................

OA ----------------------

FeA ----------.-------.-..

FeO ........................

MnO...... ..................

ZnO ........................

MgO..._ ....................

CaO ........................

Na20 ........................ L

K2O-... .....................

PA ------------------------

HA ........................

A.

51.80

.13

2 21

.51

1.29

3.50

17.76

20.99

undet.

.65

98.84

B.

50.86

3.03

1.19

1.82

.03

17.42

23.32

\76

.42

.31

99.16

C.

55.36

.22

none

.18

.57

19.53

24.48

100. 34

P.

51.45

2.94

1.06

.96

18.43

24.02

1.08

99.94

E.

49.80

1 29

 2.86

2.48

10.82

.37

15.33

16.50

.51

. .12

.33

100.41

F.

51.70

.36

.37

7.43

3.31

12^57

23.68

.12

.65

100. 19
GLAUKU.] SILICATES. 33

G. Augite from nepheline-basalt, Black Mountain, Uvalde quadrangle, Texas. Violet colored. Analysis by W. F. Hillebrand.

H. Augite from dolerite dike, near Valniont, Colo. See Cross, Monograph XXVII. Analysis by L. G. Eakins.

I. Augite from tingnaite, Two Buttes, Colo. Specific gravity, 3.43 

at 28°. Analysis by W. F. Hillebrand.

J. Pyroxene from syenitic lamprophyre, Two Buttes, Colo. Specific 

.gravity, 3.45 at 25°. Analysis by W. F. Hillebrand.

K. Augite from granite, north end of Blue Mountains, Silver Cliff, 

Colo. Specific gravity, 3.225 at 18°. Analysis by L. G. Eakins.

L. Augite from the Golden King dike, Silver Cliff, Colo. Specific 

gravity, 3.281 at 13°. Analysis by L. G. Eakins.

M. Pyroxene from norite, dike east of Sugar Loaf, Boulder County, 

Colo. Analysis by L. G. Eakins.

SiO, ...............

TiO, ...............

ZrOa ............

Al O

rv r>

Fe2 03 ..............

FeO

MnO. ..............

MgO.. .............

CaO ...............

Na.O .....'.........

KaO. --------------

Li,0 ...............

BaO .. ......I.. ....

SrO... -------------

NiO.. ......... ....

P n

H.,0.... ............

G.

45.23

4.28

7.73

2.95

4.07

.07

12. 25

23.37

.47

.12

none

.05

.37

1.00. 9G

H.

49.10

7.95

' 8.30

12.37

22.54

trace

.

100. 26

I.

47.54

3.00

none

4.14

trace?

5.64

6.42

.36

10.05

21.57

1.38

.12

trace

none

trace

rmclet.

100.22

J.

51.27

.70

none

3.05

3.08

4.34

.28

14.21

22.58

.67

.06

none

.03

 undet.

100.27

K.

 48. 72

9.27

3.77

6.34

.34

14.67

"16.79

.19

.18

100. 27

L.

54.87

6.34

2.88

4.61

.14

14.47

15.87

.28

.31

99.77

M.

47. 32

6.37

2.56

14.40

13.43

16.08

100. 16

Bull. 220 03-
34 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BUM,. 280.

N. Pyroxene from Italian Mountain, Gunntson County, Colo. Associated with idocrase, scapolite, garnet, epidote, etc. Analysis by 

L. G. Eakins. Specific gravity, 3.312 at 10.7°.

O. Augite from basalt, 6 miles northeast of Grants, Mount Taylor 

region, ISTew Mexico. Analysis by T. M. Chatard.

P. Pyroxene from peridotite, east of Fort Ellis, Mont. Partial 

analysis by F. W. Clarke.

Q. Pyroxene from basalt, east side of Bozeinan Creek, 2£ miles 

southeast of Bozeman, Mont. Described by Merrill, Proc. U. S. Nat. 

Mus., vol. 17, p. 637. Analysis by L. G. Eakins.

SiO2 . -.-_._-. ....,_....-. ................

TiO2 .........'............:.................

Al O

CrA ............. ..:.....................

Fe A -.-....-

FeO---.. .- --..' . ......................

MgO......,-. ........I.. ........ ...........

NiO.CoO.. ....:. .........'..... ....... .......

MgO... ... .-- -.

CaO --- -----.-. ........--;.-. .

Na^O....... ................................

K2o.----- --------------- ------------

PA -------------------------------

H20. ........ ................................

N.

47.53

9.88

1.79

.91

trace

14.43

-25.46

trace

-

.30

100. 30

O.

47.06

1.82'

7.77

trace

1.30

8.15

.20

trace

13.52

19. 33

.33

.11

.06

.20

99.'85

P. -

51.95

4 21

5.90

tmdet.

13.81

23.32

99.19

Q.

52.50

2.26

1.07

2.05

2 47

17.11

21.70

.35

.07

.64

100.22

JEGIRITE.

From Magnet Cove, Arkansas. Analysis by George Steiger.

SiOa ..^.................I.............................'...... 50.45

A1A-------- .........................L.......:............. 2.76

Fe,O8 --"- -------- ------------------.---------- 23.42

FeO. 

MnO 

MgO 

CaO. 

Na2O

HjOaf 100°.... 

H,O above 100°

5.26

.10

1.48

5.92

9.84

.24

.15

.40

100.02
CljAHKJfi.] SILICATES. 35

JADEITE.

The following analyses of jadeite, all by F. W. Clarke, were discussed by Clarke and Merrill in'the Proceedings of the United States 

National Museum for 1888. They all represent worked material.

A. Light-colored bead, mottled with emerald green, from State of 

Oaxaca, Mexico. Specific gravity, 3.007, determined by William 

Hallock.

B. Carved head, light green, from Zaachita, Oaxaca. Specific 

gravity, 3.190, Hallock.

C. Fragment from Sardinal, Costa Rica; pale green, translucent. 

Specific gravity, 3.32, Clarke.

D. Fragment from Culebra, Costa Rica; light green, granular, 

opaque; quite impure. Specific gravity, 3.27, Clarke.

SiO, _..______....._...._.... -. . 

A12O3 .-...--.....--.--.-.....-...--.....-...

rv n

FeA -------------------------------

FeO ................ ............. .... ...

MgO ........................................

CaO. ......................................

Na.O __......_...-.-._.......-.---......--,

K20.-.----- ................................

Ignition .-..-...-..---...-..-.--...--...--...

A.

 58.88

25.93

.12

J .24

.36

.40

11.64

.63

1.81

100. 01

B.

58.18

23.53

1 1.67

 1.72

2.35

11.81

.77

.53

100. 56

c.

59.18

22.96

i 1.87

.67

1.52

12.71

trace

.90

99.81

D.

58.33

21.63

1.71

.73

3.09

4.92

8.13

.22

.93

99.69
36 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BUM,220.

WOLLASTONITE.

Compact variety, from Diana, 1ST. Y. Partial analysis by E. A. 

Schneider:

50.05

1.13

SiO2 _....................................................

A1A-------------------------------- ---------

FeA---------------------------------------------------

CaO.-...................................................... 47.10

MgO ........................................I.................. .09

H9O.......................................................... .45

PECTOLITE.

A. Stone hammer, at first supposed to be jade, collected among the 

Eskimo of Point Barrow, Alaska. Analyzed by F. W. Clarke, and 

described by him in Bulletin 9. Pale apple-green, tough, compact, 

highly polished. Specific gravity, 2.873.

B. Radiated pectolite from Bergen Hill, New Jersey. Analyzed by 

E. A. Schneider.

C. Another sample from Bergen Hill. Analysis by George Steiger.

Si02 ._ .................................. ........

AlA+FeA ----------------------------------

MnO. ...... ....................................

CaO ..I-. -.....---' -_--.- ------.-...-.-_

MeO

NaA ..........................................

pn UU2 _..----.- - ----- ------ -------- -------

H2O at 105°-.....-...................,..

H2O, 250°-300°. ....... -.----.-.......-.--.--.--

HjjO, red heat ........................... .......

A.

53.94

.58

32.21

1.43

8.57

4.09

100.82

B.

53.11

.40

-.81

33.88

8.62

.04

.14

2.86

99.86

.0.

53. 34

.33

.45

33.23

9.11

.67

.27

I 2.70

100. 10
CLARKE.] SILICATES, 37

AMPHIBOLE.

A. Tremolite, pseudoinorphous after sahlite; northeast slope of 

Canaan Mountain, Connecticut. Analysis by W. F. Hillebrand.

B. Tremolite, found in the serpentine of Easton, Pa. Analysis by 

L. G. Eakins.

C. Actinolite ('?), Corundum Hill, North Carolina. Specific gravity, 3.062. Analyzed by T. M. Chatard and described by him in Bulletin 42.

D. Nephrite, New Zealand. Fragment from a dark-green bowlder. 

Analysis by F. W. Clarke.

E. Nephrite, Robenhausen, Lake Pfaffikon, Switzerland. Part of 

a green, compact, highly polished jade implement. Specific gravity, 

3.015; determined by William Hallock. Analysis by F. W. Clarke.

Si02 ...............................

Ti02 ...............................

A1203 ..............................

rv r\

FeA ..............................

FeO. ...............................

MiiO -..--.--- ......................

NiO, CoO ..........................

CaO.... ...................... ......

SrO.. ..............................

MgO. ...... ........................

K.,0.... ............................

Na20.. .............................

H.O at 100°........ ...... ............

KjO above 100° __._____.____..__.__.

C02 .............._.... ...........

A.

57.97

none

.09

.11

.18

trace

15.05

trace

22.45

.12

.20

.03

2.57

1.69

100.46

B.

58.27

.33

trace

.08

11.90

25.93

.42

1.25

| 1.22

'

99.40

C.

55.23

none

3'. 04

.19

1.88

2 51

.26

trace

13.36

22.31

X *« > . 5o

.04

.52

99.92

D.

56.73

 

3.22

/ 5.96

trace

13.24

19. 42

tindet.

| .83

99.40

E.

56.87

1.50

p. 33

trace

13. 45

21.06

niiclet.

} .63

99.84
38 MINERAL 'ANALYSES BY U. 8. GEOL. SURVEY. .[BUM,.280.

F. Dark-green nephrite implement, from the Eskimo of Point Barrow, Alaska. Specific gravity, 3.012. Analysis by F. W. Clarke. 

. G. Nephrite adze, Point Barrow. Nearly black, with grayish-green 

patches. Specific gravity, 2.922, Hallock. Analysis by F. W. Clarke.

H. Nephrite adze, Cape Prince of Wales, Alaska. Dark green, 

laminated in two shades, opaque. Specific gravity, 2.989, Hallock. 

Analysis by F. W. Clarke.

I. Worked nephrite, St! Michael, Alaska. Dull apple green, fairly 

uniform in tint, semitranslucent at edges. Specific gravity, 3.006, 

Hallock. Analysis by F. W. Clarke.

J. Jade implement, Diomede Island, Alaska. Dark green, laminated in two shades, opaque. Specific gravity, 3.010, Hallock. Analysis by F. W. Clarke.

SiO, ...-_..:

Ai2 o3 

FeO. _._^ _ . 

CaO_. ------------------------------

MgO ----------------------------

MnO--_ ............................

Alkalies...- _...... ...i. _........:.

F:

57.01

.42

6.95

12.75

21.36

1.41

undet.

99.90

G.

57. 11

2.57

5.15

11.54

21.38

2.06

undet.

99.81

H.

56.01

1.98

6.84

12.' 54

21.57

1.91

undet.

100. 35

I.

56.12

- .63

7.45

12 72

20.92

trace

1.42

undet.

99.26

J53. 08

1.01

7,67

13.35

19.96

trace

2.03

undet.

100. 10
CLATtKK.] SILICATES. 39

K, L, M, N. Four samples of nephrite, found in situ by Lieutenant 

Stoney, TJ. S. Navy, near the Kowak River, Alaska. K, greenish 

gray, splintery-lamellar. L, like K, but more granular. M, paler, 

nearly white, closer grained. N, brownish, highly foliated. Analyses by F. W. Clarke. Ferrous iron determinations by R. B. Riggs. 

O, Nephrite from Jordansmuhl, Silesia; analysis by George Steiger; 

typical material from an old locality.' For details concerning nephrites 

Dto N, see the memoir by Clarke and Merrill in Proc. IT. S. Nat. Mus. 

for 1888.

Si02 ._ ............_:_....__....._......

'no^. ...............................

AIA .............:............:...

FeA . ............. ^. ......

FeO- ..............................

MnO..... ..........................

NiO. ...............................

CaO ................................

MgO-.-----. - ---..------..

Alkalies . .....--...-...-..-....-....

PA----..---- -------

H2O at 103°. _...._--_._-.-_ :........

H2 0 above 100° ... ...................

K.

58.11

.24

5.44

.38

trace

12.01

21.97

undet.

'

1 1.78

99.93

L.

55.87

2.07

5.79

.38

trace

12.43

21.62

undet.

. } 1.38

99.54

M.

56.85

.88

4.33

1.45

trace

13.09

21.56

tindet.

| 1.76

99.92

N.

~57. 38

.19

4.43

1.25

trace

12.14

22.71

undet.

| 1.73

99.83

0.

56.39

none

1.63

1.72

3.70

.26

.13

7.92

24.63

none

trace

.65

3.42

100. 45
40 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL.230.

P. Brown hornblende, Pierrepont, 1ST. Y. Analysis by T. M. Chatard. . Q. Hornblende separated from gabbro, east % shaft of waterworks 

extension, Washington, D. C. Analysis by R. B. Riggs.

R. Aniphibole from the serpentine of Montville, N. J. Aualysis by 

L. G. Eakins.

S. Hornblende separation, from south of soapstone quarry, Warwick, Mass. Analysis by E. A. Schneider.

T. Hornblende from amphibolite dike, Palmer Center, Mass. Specific gravity, 3.220 at 31.5°. Analysis by W. F. Hillebrand.

U. Hornblende from amphibolite bed, same locality and analyst. 

Specific gravity, 3.217 at 29°. 

Si02 ............. .............

TiO2 ........................

A1A -. ..-... -

VA------ ----- - -

CI-A ------------------

FeA ------------------- --

FeO- ..........._.-.:......

MnO. .......................

NiO.. .......................

CaO ........................

MeO

KjO..... ....................

Na2O .......................

H2OatlOO° .................

H2 0 above 100°...... ........

P n

p.

56.44

.11

1.77

.84

.73

.11

11.83

22.98

.75

2.13

.05

2 41

trace

100. 15

Q.

52.42

3.15

3.60

8.36

.11

14.33

15. 85

.12

1.16

| 1.25

100.35

R.

43.31

17.41

. .71

.59

.14

12. 84

19.39

1.36

2.23

| 1.17

99.15

S.

47.86

«.63

14.09

.33

13.41

.14

.57

19.89

.06

.93

2.46

.05

100.42

T.

43.11

1.32

11.10

.07

trace

4.97

13.04

.43

trace

11.76

9.35

1.27

1.18

.16

1 92

.10

,99.78

u.

44.09

1.73

10.68

tindet.

trace

2 72

12.96

.32

trace

11.58

10.75

.88

1.19

.21

1,91

.10

99.12

"Admixed rutile.
CLABKB.] SILICATES. 41

V. Hornblende near barkevikite. Separated from the sodalitesyenite of Square Butte, Highwood Mountains, Montana. Described 

by Lindgren in Am. Jour. Sci., 3d ser., vol. 45, p. 286. Analysis by 

W. H. Melville.

W. AmpMbole separated from quartz-diorite, south of Table Mountain, on ridge between Butte and Plnmas counties, Cal. Described 

by Turner in Seventeenth Annual Report, Part I, p. 521. Analysis 

by William Valentine. Chromium determination by Hillebrand.

X. Amphibole separated from amphibole gabbro, Beaver Creek, 

Big Trees quadrangle, California. Analysis by William Valentine. 

See Bulletin 168, p. 206.

Y. Amphibole separated from quartz-monzonite, Tioga road, southeast of Mount Hoifman, Mariposa County, Cal. Specific gravity, 

3.203 at 21.5.° Analysis by W. F. Hillebrand. See Bulletin 168, 

p. 208.

Z. Amphibole separated from the granite of Butte, Mont. Incomplete analysis for lack of material. Analysis by H. N. Stokes.

Si02 ... ......... .....................

Ti02 ................;..............

AI r>

VA - - - - 

rv r>

Fe2 03 ..............................

FeO...... .......'...................

MnO. ............................ ..

NiO... .............................

CaO. .............. ...... ............

MgO-. ......... ....................

Na2O- ..............................

K2 0.... .............................

LiaO ...............................

H2OatlOO° ......................:.

H2O above 100°......... ............

P205 ...............................

F...... ...........................

O equivalent to F. ...............

V.

38.41

17.65

3.75

21.75

.15

10.52

2.54

2.95

1.95

24

99.91

W.

50.08

.76

7.97

.16

2.69

6.71

.49

11 21

16.31

1 22

.46

1.40

undet.

99.46

X.

46.08

.77

10.56

2.81

8.30

.15

12.64

14.40

1.62

.34

none

.17

1.97

.18

none

99.99

y.

47.49

1.21

7.07

.04

4.88

10.69

.51

.02

11.92

13. 06

.75

.49

trace

1.86

none

.06

100. 05 

.02

100.03

Z.

45.73

1.43

6.77

none

4.94

10.39

.54

11.25

12.32

.77

1.22

trace

.49

2.29

.35

.28

98.77 

.12

98.65
42 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL. 220.

BERYL.

A. White beryl from the tin mine at Winslow, Me. Opaque, milky, 

associated with mica, fluorite, calcite, tinstone, etc. Specific gravity, 

2.707 at 27°. Analysis by W. F. Hillebrand.

B. Green beryl from near Home post-office in eastern Tennessee. 

Analysis by F. W. Clarke.

Si02 ._._ .....__...._....,..._......._...._..._..__...

TiO2 ................... ......................... .....

A12O3 _..-._.--....--..-...------.-................-.

Fe2 03 ....................................................

FeO .. .

G1O.. ............... ...._,_.........._........._. ..._.....

K2O, Cs.,0. ............ ..'... ..----.---.-.--..--.-- ---..

Na2 0... ..................................................

Li2O .......... .......:............-......................

MgO... ...................................................

HjO.... ........ ..........................................

A.

65.21

trace

18.50

-v .33

13.03

.14

.87

.16

.09

1.80

100.13

B.

65. 39

} 19.10

13.35

1.76

99.60

NEPHELITE.

A. Elseolite from Litchfield, Me. .Dark-gray cleavable masses, of 

greasy luster. Described by F. W. Clarke in Bulletin 42.

B. Another sample from Litchfield. Analysis by George Steiger.

C. Nephelite extracted by solution from the elseolite-syenite of Red 

Hill, K I-L Described by Bayley in Bull. Geol. Soc. America, vol. 3, 

p. 231. Analysis by W. F. Hillebrand.

Si02 ._ ...........................................

A1203 ...........................................

Fe2O3 ...........................................

FeO. ..............................................

MgO ...........................................

CaO...................... ... ............ ......

Na20. .............................. .... . ..--

K2O. ........ ....i.... .............'.-.......... .

H2O at 100°...... ............... ................

H2O above 100°.. ...............................

'CO,.. .............. ............................

. A.

43.74

34. 48

trace

16.62

4.55

\ .86

100.25

B.

45.91

31.14

.34

.23

.33

 14.60

5.60

.47

.93

.40

99.95

 c.

45.31

32.67

.16

2.00

12.60

5.70

1.56

100.00
SILICATES. 43

CANCKINITE.

All from Litchfield, Me. See description by Clarke in Bulletin 42.

A. Pale yellow, granular.

B. Bright orange-yellow, cleavable, transparent in thin fragments.

C. Dingy pale yellow, otherwise like B.

D. Average yellow sample.

E. Flesh-colored, cleavable mixture of elseolite and cancrinite. 

Analysis D by George Steiger; the others by F. W. Clarke. C02 

determinations in A, B, C, E by R. B. Riggs.

'

Si02 ________..._____._'..._......._.

A1203 ..............................

Fe203 ----------------------------

MnO...... .........................

CaO ...il:... ......................

MgO. ..............................

Na20 ..............................

KaO- - - - -.. .

HA- ............................ ..

C0a ......... I . .........

A.

37 22

OQ QO

trace

trace

4.40

.07

19.43

.18

3.86

6 22

99.70

B.

36.29

30.12

trace

trace

4.27

19.56

. .18

2.98

6.96

100. 36

C.

35.83

29.45

trace

5.12

19.33

.09

3.79

6.50

100. 11

D.

36.19

29.24

trace

4 72

19.20

.14

4.15

6.11

99.75

E.

38.93

32.52

2 47

17.02

3.23

2.83

2.95

99.95
44 MINERAL ANALYSES BY U. S. GEOL. SUBVEY. [BUT,L.SW.

SODALITE.

A. Blue sodalite, from Litchfield, Me. Analysis by F. W. Clarke. 

See description in Bulletin 42.

B. Blue sodalite, from Ice River, near Kicking Horse Pass, British 

Columbia. Analysis by George Steiger.

C. Sodalite separated from the sodalite-syenite of Square But1;e, 

Highwood Mountains, Montana. See Lindgren in Am. Jour. Sci., 3d 

ser., vol. 45, p. 286. Specific gravity, 2.265. Analysis by W. H. 

Melville.

sio,. .. ..-.---..- - ..- . :

FeA----- ------------------------------------

FeO .......... ........... ......................

MgO... ........................................

CaO ............ ._....................----..--

Na2O ....._.._..._.._.__:....._.._....-..--..-

K2 0 .-...-......................-......:...-.

H2O'at 100°........ ......... ................. 

H2O above 100° ........... 1. .................... .

Cl. .......... ....'..... . .......... ........ ------

O equivalent to Cl---....- ............. ---------

A.

37.33

31.87

24.56

.10

} 1.07

6.83

101.76 

1.54

100. 22

B.

39.66

30.09

.31

.18

22.60

1.14

.17

' .79

6 12

101.06 

1.39

99. 67

C.

41.56

29. 48

.49

.15

.49

19.21

.91

.45

3.73

4.79

101.26 

1.08

100. 18

ZTJNYITE.

From the Zuni mine, Anvil Mountain, near Silverton, Colo. Analyzed by W. F. Hillebrand, and described by him as a new species in 

Bulletin 20. Specific gravity, 2.875 at 15°.

SiO2 ........................................................ 24.33

FeA-------------------------------------- ------------- .20

A1A------------------------------------------------------- 57.88

K20_.

Na2 0.

.................................................. .10

.................................................. .24

Li2O---. -.--..--.....-.........-.-----.._.---.....----........ trace

H2 0----.-.,-----..---.....--..---------------............'... 10.89

P.O«.......................................1............'.... .60

F .

Cl.

5.61

2.91

O equivalent to F and Cl.

102.76

3.02

99.74
CLAKKK.] SILICATES. 45

GARNET.

A. Grossularite. Large waterworn pebble, pale green, very compact. At first, thought to be jade. From Eltoro, 40 miles south of 

Los Angeles, Gal. Described by Clarke in Am. Jour. Sci., 3d ser., 

vol. 50; p. 76. Analysis by George Steiger. Specific gravity, 3.485.

B, C, D. Three samples of garnet from Italian Mountain, Gnnnison 

County, Colo.. Specific gravities: A, 3.72 at 16°; B, 3.629 at 23°; C, 

3.721 at 17.2°. Analyses by L. G. Eakins.

E. Pyrope from the peridotite dike of Elliott County,'Ky. Described 

by Diller in Bulletin 38. Analysis by T. M. Chatard.

F. Garnets from Hawkes's quarry, Goshen, Mass. Alinandite. 

Analysis by George Steiger.

SiO.,.. -- - .

TiO

Al O

rs- n

FeA ...--..I---.-...----....

FeO. ...-..---------.....-...

MnO...-- . -.--.--. 

CaO_. .......................

MgO.......... ..... ......

NaA-- .....................

KaO.. ......... .............

H^O. :- -- . PA ..............'..........

A.

37.54

trace

22.84

.79

.26

36.66

.44

i 13 }

1.74

100. 40

B.

37.89

7.90

16.43

35.43

.59

1.10

trace

.36

99.70

C.

39.26

19.63

4.48

trace

36.61

trace

.16

trace

.08

100. 22

D.

36.88

10. 34

17.51

34.85

.43

.21

100.22

E.

41.32

.16

21.21

.91

4.21

7.93

.34

4.94

19.32

.07

.17

100.58

F.

37.30

.24

21.84

.98

32.62

1.86

3.19

2.50

100. 53
46 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL. 220.

G. Spessartite from Amelia Court House, Amelia County, Va. 

Pale brown, crystalline masses. Analyzed by F. W. Clarke and 

described in Bulletin 60.

H. Spessartite from Llano County, Tex. Yellow, granular. Analyzed by W. H. Melville and described in Bulletin 90. FeO could not 

be separately determined.

I. Spessartite from cavities in rhyolite, Nathrop, Colo. Brilliant 

crystals. Specific gravity, 4.23 at 18°. Described by Cross in Am. 

Jour. Sci., 3d ser., vol. 31, p. 432. Analysis by L. G. Eakins.

J. Garnet from the Peacock mining claim, Seven Devils mining 

district, Idaho. Associated with bornite and powellite. Analyzed 

by W. H. Melville and described in Bulletin 90.

K, L. Two samples andradite from Clifton, Ariz. Analyses by 

George Steiger.

SiO, ........................

TiO

ALA .- -.- :-- -.-

FeA----'---- --------

FeO

MnO-------- --.- ---

CaO --------.---.---_..----.

BaO ...................... 

MgO........ ..............

Na2O----.----. ..............

^0....... ..................

CuO -----------------------

P o

H2O at 100°...... ............

H2O above 100°.. ..-....-.-..

G.

35.35

20.41

2.75

1.75

38.70

.94

none

I .27

100. 17

H.

35.93

trace

18.08

-> 4.60

31.77

8.48

trace

.69

} .1,

none

.03

.36

100.11

I.

35.66

18. 55

.32

14.25

29.48

1.15

21

27

| .44

100.33

J.

38. 67

10.08

16. 00

.91

33.35

.77'

trace

| .06

99.84

K.

36.26

none

.78

32.43

. -.32

27

29.67

.06

.13

.44

100. 36

L.

42. (33

1.53

31.41

.30

.43

23.37

trace

99.67
CLAIUvK.] SILICATES. 47

CHRYSOLITE.

A. Transparent green pebbles from near Fort Wingate, N. Mex. 

Analysis by E. A. Schneider.

B. Transparent olivine from the meteorite of Kiowa County, Kans. 

Described in Bulletin 78. Specific gravity, 3.376 at 23.2°. Analysis 

by L. G. Eakins.

C. Olivine from the peridotite dike of Elliott County, Ky. Described by Diller in Bulletin 38. Analysis by T. M. Chatard.

D. Olivine from the peridotite at Riddle, Oreg. The rock is the 

matrix of nickel silicates. Described by Diller and Clarke in Bulletin 

60. Analysis by F. W. Clarke.

E. Olivine from olivine-gabbro, Avest side of Birch Lake, Minnesota. 

Described by Bayley, Jour. GeoL, vol. 1, p. 688. Analysis by W. F. 

Hillebrand.

SiO,-... .' - ... .

TiO

A1A- --- -- ------ -

CrA ----- - - - - 

Pe,08 .... ... ............... ......

FeO.... ............................

MnO. ...............................

NiO.... ........................ ....

CoO.... ........................... .

MgO. ..............................

CaO.... ............................

Na.O ......_..... ........_.......

K2 0.. ...... ...... ..................

HjOatlOO0 ..... ....................

H2O above 100°.. ........... ........

PA- -- ' - - -------

A.

41.98

.51

5.71

.10

.42

51.11

.05

.23

100. 11

B.

40.70

.18

10.79

.14

.02

48.02

99.85

0.

40.05

.07

.39

.24

2.36

7.14

.20

trace

46.68

1.16

.08

21

.14

.66

.04

99.42

D.

42.81

.79

2.61

7.20

.26

45.12

none

1

} .57

99.36

E.

35. 58

1.22

.92

trace

/ 33. 91

.35

| .20

26.86

.90

.11

.20

100.25
48 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [MULL.220.

MIZZONITE.

From a gulch on the side of Italian Mountain, Gunnison County, 

Colo. Analysis by L. A. Eakins.

Si02 -----.----.-..----------.----.----.---------------------- 57.55

Al-tOy....................................^..:............... 21.53

Fe.,0,.------.----.-----------------------.------,-----..-.-_ -2^3- trace

CaO-. 

K20-. 

Na2OH2OCl-.-.

6.18

1.64

7.43

3.23

2.82

O eqiiivalent to Cl.

100.38

.63

VESUVIANITE.

A. Finely crystallized material from Italian Mountain, Gunnison 

County, Colo. Analysis by L. G. Eakins. Specific gravity, 3.394 

at 20°.

B. From Nevada, 24 kilometers northeast of Silver Peak. Analysis 

by George Steiger.

C. Pale green, massive. South Fork of Indian Creek, 12 miles from 

Happy Camp, Siskiyou County, Cal. Analysis by George Steiger.

Si02 -.- - .- -. - .

TIG, -_...._-_...__.--..-.-..__..-_--...__.

A1A- ---------------------------------- ........

Fe2 03 ..........................................

FeO.. ...................................... ....

MnO...........................................

MgO..... ...... ............ .-.'..-.-.- ......

CaO.............--..---.-....-.----...-..--.....

Alkalies ...-. ----------------------------------

H2Oat 100°.. ----_..-.--------..-..-------_-. ...

H2O above 100° .......... .......................

P n

CO, .- ----.---.. ......... ..

F . . ..

A.

37.11

19.30

3.31

3.89

36.24

} -06.

.58

100. 49 

.24

100.25

B.

36.80

.66

17.53

1.56

3.27

.48

1.23

35.00

.13

.10

1.56

.07

.65

.88

99.92 

.36

99. 56

C.

35.86

.10

18.35

1.67

.39

.05

5.43

33. 51

none

.29

4.18

.02

none

none

99. 85

.-----..-.
CL.A MICE.] SILICATES.

ZOISITE.

A. Zoisite from gabbro, east shaft of waterworks extension, Washington, D. C. Analysis by F. W. Clarke; iron determination by R. B. 

Riggs.

B. Rose-red zoisite, James's mica mine, Yancey County, N. C. 

Specific gravity, 3.352 at 27°. Analysis by L. G. Eakins.

C. Saussurite from gabbro, Sacramento River road, 37 miles north 

of Pit River ferry, Shasta County, Cal. Specific gravity, 3.148. 

Analysis by F. W. Clarke. See Bulletin 9.

D. Saussurite from the Saas Valle}7 , Switzerland. Pale greenish. 

Specific gravity, 3.37. Analysis by F. W. Clarke; iron determination 

by R. B. Riggs.

SiO,-- ------- -..--.--.--:-.----.. -----.---

AI n

FeA -.- .- . --- ..-. ---..-

FeO. ...................................... .

MnO --.-... ---I.-.-.... -. -.------.-. -

MgO. ......................................

CaO... ---------."...'-.-. ..................

Na.0. --------------------------------------

K2O...... ..................................

H2 0. .......................................

A.

45. 12

30. 53

1.90

.42

17. 34

2.02

1.09

.74

99. 16

B.

38.98

81.02

4. 15

.23

23. 80

2.03

100. 21

C.

42.79

29.43

3. (55

1.40

18.13

2.51

2.42

100. 33

D.

48.29

27.65

1.45

5. 36

12. 95

3.57

.54

99.81

Bull. 220 03
50 MINEEAL ANALYSES BY TJ. S. GEOL. SUEVEY. [BULL. 220.

EPIDOTE.

A. Dark gray, brilliant crystals from Phippsburg, Me. Analyzed 

by W. F. Hillebrand and described in Bulletin 167.

B, C. Epidote from Italian Mountain, Gunnison County, Colo. 

Specific gravities: B, 3.448 at 25°; C, 3.452 at 17°. Analyses by 

L. G. Eakins.

SiO2 -.. '_-... -------------- ---.--'- -------'--.--

A12 03 ...... ..,... . ... ,...--...-..

FeA ........................... ............ r .

FeO--_ ....... ..................................

MnO.. ............... ..........................

MgO- . -----

CaO. .......................................... .

Na.,0. ............ .;...__. _.____..._..._...___._.

H2O_----- ------------------------------------

F

0 equivalent to F. .................. ^. ..............

A.

38.54

28.39

6.89

.50

trace

24.12

2.26

none

100. 70

B.

38.21

28.70

8.16

24.30

.21

.10

.35

100. 03 

.15

99.88

C.

37. 22

24. 09

12, 80

.79

.11

trace

23. 36

.06

1.61

.06

100. 10 

.02

100. 08

PIEDMONTITE.

From the rhyolite of Pine Mountain, near Monterey Station, Maryland. Contains a little admixed quartz. Analysis by W. F. Hillebrand.

Si02 ...................................................... 47.37

ALA-------------------------------------------------------- 18.55

Ce2 03 ------------------------------------------------------- -75

Other jrare earths, rnol. wt. at 295............................: 1.28

Fe2O3 -..-..-..-...........-----..-..--.-......-......-......- 4.02

Mn2O3 ------------------------------------------------------- 6.85

MnO ..................'...................................... 1.92

. PbO................. ....'. ..................:................ .14

CuO.. ....................................................... .11

CaO....................................................... .. 15.82

MgO.-.------..-.,.-_-_-.- -.-. ---.----.........-..-.- . .25

Li2O

-.-...-.--,...-..-.......-.-..._.........,-..-,- . .68

.................................................... .23

..-.-...-.--.-.---..--.--..-----.---.---.-------.--. trace

.H2O at 100° _____.._._........_-_....._.__..__...-...---..-._'_ .14

H.,0 above 100° ................. ............................ 1.94

P.,Or........... .............................................. trace

100,05
CLABKK.] SILICATES. 51

ALLANITE.

From Platte Mountain, Douglas County, Colo. Specific gravity, 

3.52 at 29°. Analysis by L. G-. Eakins. See Proc. Colorado Sci. Soc., 

vol. 2, p. 32.

SiO, 31.13

Al A......................................:................. 11.44

FeA 6.24

CeA---- --------- ----------- ------------------------------- 12.50

(LaDi) A --------------------------------------------------- 10.98

-------------------.---.---.-........----.---.--..- 13.59

-.-.-.--...--.- ................................... " .27?

....... --...... ........ ........-.........'.......... .61

...... -. ---..--.---...-.......... ................... 9.44

.................................................... .16

-_--_-----------.- ...........-----.-. ............. trace

.. .......................... ....................... .56

BaO. 

MnO 

CaO.

MgO

Na2 0

H,O -.-.-. ................................................... 2.78

CO, ........ I....... .....-.-._..._._. ....._..;__....._.__...._ .21

P2O5 --_------.---------------.--__._-_--'-- .-.------.-. ...... trace

99.91

PKEHNITE.

A. From Paterson, N. J. Analysis by George Steiger. 

B. From Fassa, Tyrol. Analysis by E. A. Schneider.

SiO2 .. .................... '.--...-..........-..-...-.......

AT n

Fe-A---------- ------------------------------------- --- ---

FeO.....-...--..-........--...--------..-...-..-.-.-......

CaO.....---.------...--.-..---.-.-.-.--...-..----........

MgO ..............................:......................

ELjO at 100°........ .......................................

H./) at 250°-300° ..........................................

H2O by ignition. .......... .-.-.. .........................

A.

42.31

19.95

6.20

26.63

21

I 4.81

100. 11

B.

 43. 32

25.50

trace

9fi 4.0

.17

.14

4.70

100. 32
52 MHSTEKAL ANALYSES BY IT. S. GEOL. SURVEY. [HULL. 220.

TOPAZ.

A. White, opaque topaz from Stoneham, Me. Specific gravity, 3.51.

B. Alteration product of A, greenish. Specific gravity, 3.42. 

Analyses A and B by j. E. Whitfield. See discussion by Clarke in 

Bulletin 27.

C. Topaz from Florissant, Colo. Specific gravity, 3.578 at 22°. 

Analyzed by W. F. Hillebrand, and described in Bulletin 20.

SiO, .-...:_._.____.___._-_.-__:-_----._...

A1A ..........................................

CaO .... . . ...... ......

MgO

K2 0 .............................. ..........

Na2O.. ...........................................

H,0... ..........................................

F

0 eonivalent to F. ................ ..-..-....--.

A.

31.92

57.38

.15

1.33

.20

16.99

107. 97 

7.16

100.81

B.

35. 15

53. 18

1.32

.17

1.52

1.28

.90

12.88

106.40 

5.42

100. 98

C.

33. 15

57. 01

1G. 04

103. 20

99.45

The final alteration of the Stoneham topaz is into niuscovite, q. v. 

The alteration product here given represents the beginning of the 

process.

SILLIMANITE.

 Fibrolite adze from Brittany. Specific gravity, 3.147, determined

by William Hallock. Analysis by F. W. Clarke. See Bulletin 60.

SiO,'............. ..........J............................... 34.66

Al,03 ---------------- ..........-........^................. 63.24

Fe.,0;)- ...................................................... trace

MgO ......................i.................................. .37

Ignition .--.-................--.-.-.....-.-..-..........--.- 1.31 0

99.58

KYANITE.

Pale green variety, associated with the dumortierite of Clip, Ariz. 

Analyzed by W. F. Hillebrand. Titanic oxide is present in appreciable amounts, but was not separated from alumina. The mineral 

contained a few black, nonmagnetic grains, which may have carried 

the titanium. Specific gravity, 3.650 -at 18.5°.
CT.AHKIC.] SILICATES. 53

SiO2 . ...-..--.--...-.:-..---.: ..--..--.-.-.--.....-_-- 36.30

AlA(TiO,) ..--...-....._-.----,---...-.....-...-.........- 62.51

FeA----------- ----------------------------------------- .70

FeO _---------.-.---.---..--. -...--...-,.-.--.-.__._..,-.. nndet.

CnO.--..----.--..---..-..----.- ---.-----------..-._---._.. trace

Ignition .................................................. :. .40

ILVAITE.

From Golconda mine, South Mountain, Owyhee County, Idaho. 

Analysis by W. F. Hillebrand. Specific gravity, 4.059 at 31°.

SiO,........................ 1................................ 29.16

A1A----------------^--------------------------------- -52

FeA-------------------------------- --------------.------- 20.40

FeO-..-.--..---..-..-.-.--...----.-----------------.--..--.. 29.14

MnO ...............__..--_-...--.--.----.-.-.-..--..--. 5.15

CaO..........:........................'................. ....--- 13.02

MgO .I..................... ................................... .15

Na,0 ..._..-......-......_..-.--..-._--.....----- -.._-..._... .08

H.,Oat;105° -.-.-......-.....-.-------.--.-.-....-..-......-... .15

H.;0 above 105° .............'..... ............................ 2.64

100. 41 

CALAMINE.

Wliite, highly crystalline. From Sterling, 1ST. J. Analysis by 

..-.--.-----. ................ .1..... -....-... 24.15

George Steiger.

ZnO_ ......................;.-....--.---.-..--.-..-.-.----... 67. 55

CaO.--.--..---..---.--....------------..------..---...--.--..- .12

H,O at 100°---. ...................... ....---..-..--...-...... .27

H,0 above 100° .............................................. 7. 68

LAWSONITE.

From Tiburon Peninsula, California. Collected by F. L. Ransome. 

Analysis by W. F. Hillebrand.

SiO,........................................................ 38.45

Ti02 ............_.......................................... .38

A1A----------------------------------------------------- 31.35

FeA ---- ----i--------------------------------.----------- .86

FeO-..------..-.---.---.--------------.---.---.--------.-.- .10

MnO --..---..---_--_---.---..------.-----.-----.------.---. trace

CaO----.----------------.------.-.------------------------- 17.52

MgO-.-.--.---.---.--....-.-----..-----------.--.----.---.- .17

K,0_----------------------------------------------- ,23

NaA -_---------------------------------------------...-- .06

Ignition.....................-..-'..-._.-.....---............. 11.21

100.33
54 MINEEAL ANALYSES BY U. S. GEOL. SUEVEY.' [BULL. 280.

STAUEOLITE.

Altered staurolite from Liberty Grove, Cecil County, Md. 

two-thirds muscovite. Analysis by George Steiger.

About

50.17

A1A-------------------------------------------------------- 27.97

FeA------ .---------.----..----..-.-...------------.- -------- 6.13

........:......-...-.-..--...-............ .... 1.18

....-............^............................ 1.15

.__....___.__._......................._._; 7.77

.............................................. .48

	.42 

H2OabovelOO° ................"..-........................... 3.94

..--_--...................................... .06

FeO.........

MgO ......

K2 0.......

Na2O.......

H2O at 100°.

99.82

GADOLINITE.

Analyses by L. G. Eakins.

A. From Llano County, Tex. Specific gravity, 4.239 at 17.4°.

B, C. From Devils Head Mountain, Douglas County, Colo. Specific 

gravities: B, 4.56 at 17°; C, 4.59 at 25.5°. Described in .Proc. Colorado Sci. Soc., vol. 2, pt. 1, p. 32.

SiO2 . ................. ^....... ...................

ThOs . ............... ........'...................

A1A ..-.. ..-..- .-.--..-...--..........

FeA ------------------------------------------

Ce203 ..........................................

(LaDi)A -----------------------------------.

V O

ErA ------------------------------------------

FeO- ..........................................

MnO .................... .......................

Gio.. .. ..........................::........ ..

CaO.. ..........................................

MgO-....-.-.-.-.-----...-....-.....-.--...-...

KA ......................................... ..

"NskzO.. .........................................

H20 ...........................................

PA

A.

23.79

.58

.96

2.62

5.22

\ a 41. 55

12.42

11.33

.74

trace .

trace

trace

1.03

.05

100. 29

B.

22. 13

.89

2.34

1.13

11.10

21.23

&9.50

&12.74

10.43

7.19

.34

.14

.18

.28

.86

100. 48

C.

21.86

.81

.54

3.59

6.87

19.10

612.68

&15.80

11.36

.11

5.46

.47

.16

.20

.32

.74

100. 0.2

"Molecular weight, 260.

6 Molecular weight Y, Er group: in B, 296; in C, 294.
SILICATES, 55 

YTTRIALITE.

From the Barringer mine, Llano County, Tex. Analyzed by W. F. 

Hillebrand, and discussed in Amer: Jour. Sci., 4th ser., vol. 13, p. 145.

' SiOjj ......................................................... 29.63

TiO,. ................. ............... ..I................. .. .05

ThO,-...,.. ....... ........ __,......,._ ........................ 10,85

XJ02 _.__.,._--,........,._......__.....,.,.......-_. ...... 1.64

CoyOt.. '........ .......f ...... ................................ 3.07

LaA group, rnol. wt. , 335.6. ........... ^ .--......-- .... .^ ... 5. 18

Y2O3 group, mol. wt., 265.8...... ...................... ...... 4.3.45

FeA- ------------ .- -- ------..--...------.----.-- - .76

FeO... ......... ............................................ 1.96

. MnO ......... ......^..............,......... ............ .88

PbO - ...---:...----.- - - ---------.- . -- ' .80

CaO... ..............................................:...... .67

MgO. ___........-..- - --. -.- - -.-. - .16

H^OatlOS". .................................. -...--. ...... .32

HA above 105° ............................................. .04

co, ..__.__ ...... _.._...................... ... .- .11

PA "- -.... .-.. .--..-..--...- .12

A, He, F, and alkalies by difference ________._ __..__._._._.__ .31

100. 00. 

ROWLANDITE.

From Llano County, Tex. Analysis by W. F. Hillebrand, with discussion in Bulletin 113. Specific gravity, 4.513 at 15.5°.

SiOj ............... ...,>.. .................................... 26.04

' ..'X«. -..- ..'.--.- --.. ................................ .39

ThO, ......... ...............:............!........ .......... .59

CeA- ----------------------------------------------------- 5-06

La A group, mol. wt. , 336.8. ................................ 9. 34

YtA group, mol. wt., 266.2... ............................... 47.70

FeA----- .--- -------...-- - --- ---- -------- -09

FeO.................-.---.......-.-........-...-,-...----... 4.39

MnO .............'_......-.................................... .67

CaO......-......-...-..-....-..---.-. ...................... .50

MgO ___..__ __.._.. _.._...__.._.'. ._ .._..._... 1.62

Alkalies ....................................................... .28

H,O ..................................................... .24

CO. _ ....__.___ _..___.___._:__.._.__ ...... .34

P............................................................. 3.87

P2O5 --.-.-...---.. . -.-.--.----.-.--.-.-.----.--..---..-..... trace

101.12 

O equivalent to F ............. ............................... 1.63

99.49 

MACKINTOSHITE.

From Llano County, Tex. Analyzed by W. F. Hillebrand and 

discussed in Bulletin 113." Specific gravity, 5.43 at 21.4°. Only ninetenths of a gram available for analysis.

«A mixture of indefinable earths with some uranium and a trace of titanium.
56 MINERAL ANALYSES BY U. S. GEOL. SURVEY. I BULL. 820.

group . 

Yt2O3 group - '

SiO,..-----------...---__-__-_._-.___.__.__-____..______._._ 13.90

UO2 .... ............. .......................'.................. 22.40

ZrO2 P..........................._.__:__.._______..___.____._ .88

Th02 ........................................... ..............145.30

.---....-.----.........................:....\ 1.8G

.............................................. 3.74

.-.--- ------------..------.------..._.. _.:._ 1.15

.........................'........'........... .59

-'-------------------.-.------_._-_--..--_.__ .10

is^o.....:.............................^....................... .42

(NaLi) 2O.................................................... .68

PA--- - "-- - - ---- - -67

H2 0 at 100°.................................................. .50

H2O above 100° --.--.----.-..-.------.-.................-.,.. 4.31

Fe'O -

CaO.

MO

96.50

CYRTOLITE.

A doubtful mineral from Devils Head Mountain, Douglas County, 

Colo. Analyses by W. F. Hillebrand, with description in Proc. Colorado Sci. Soc., vol. 3, pt. 1, p. 44. Brown crystalline growths of irregular form. Specific gravities: A, 3.70; B, 3.60; C, 3.64. The material 

may be a mixture of c}7rtolite or some analogous alteration of zircon 

with limonite and a phosphate. .

Si02 . ....... ----.--.-.---.--...-------- ---------

TaA ------------------------------------------

SnO2 ..... . ..-...--- ...--- --..--.

Zr02 -.--- --.---..------.--.------ --------------

Th02 ..... ................................ .

CeA --------------------------- --------------

(LaDi) A --------------------------------------

ErA -...--....--..-.-.-.-.-...-------- -

YA --------------------- ----------------------

FeA ------------------------------..---..------

MnO... ......'................. ....... .'.--....

CaO .............,.................... -....-

MgO --.-.-...---------.-------------------- --.-

KjO.. ---------------------- ......-....- .'....

Na,0. ..........................................

HgO.... ----------------------------------------

PA ----------------- ...-------.-----.----------

F ----------------- -.

A.

0

20.06

47. 99

1.16

.06

.19

4.77

2.27

5.53

.47

1.99

 .13

.20

.46

12.87

1.64

or;

100. 04

B.

20. 64

.71

.03

47.81

i 1.20

4.76

2.48

5.97

.57

1.93

.11

.10

.50

12.00

1.75

42

100. 98

C.

19.21

51.00

.60

4.55

3. 18

4.86

.33

2.15

.17

.42

12 97

.93

42

100. 74
CLABKK.] SILICATES. 57

DANBURITE.

From Russell, 1ST. Y. Analysis by J. E. Whitfielcl. See Bulletin 55.

SiO,......................................................... 49.70

<BA--------------------------------------------------------- 25.80

Ca6_.-...--..-----*-..--- .................................. 23.26

FeA, A1A ................................................. 1.02

Ignition ...-......-......-.----..-..--........-..... ......... .20

99.98 

DATOLITE.

From Bergen Hill, 1ST. J. Analysis by J. E. Whitfield. See Bulletin 55.

Si02 ............................................. ............ 35.74

BA----------------------------------------.------------- -- 33 - 60

CaO .......-............._ -....---.---.-.-...-. - .- 35.14

FeO.............. .............................................. .31

ISO......................................................... 6.14

99.93

AXINITB.

Analyses by J. E. Whitfield, with discussion in Bulletin 55.

A. Clove brown, from Cornwall, England. Translucent.

B. Pearl gray, from Bourg d'Oisans, Dauphiny. Transparent.

SiO,.

FeA 

FeCLCaO . 

MnO. 

MgO. 

BAA.

42.10

17.40

3.06

5.84

20.53

^4.63

.66

4.64

1.80

100.66

B.

41.53

17.90

3.90

4.02

21.66

3.79

.74

4.62

2.16

100.32
58 MINERAL ANALYSES BY tf. 8. &EOL. SURVEY.

DUMORTIERITE.

A. Harlem, N. Y. Analysis by R. B. Riggs. See Am. Jour. Sci., 

3dser., vol. 34,. p. 406.

B. Harlem, N. Y. Analysis by J. E. Whitfield.

C. Near Clip, Yuma County, Ariz. Analysis by J. E. Whitfield.

D. Purified sample from Clip. Analysis by Whitfield. Specific 

gravity a little over 3.265.

See note by Whitfield in Bulletin 60, and paper by Diller and Whitfield in Bulletin 64.

SiOa .......................................

ALA -------------------------------------

Fe2O3 .-_----.-.--.----.------------..--_-

CaO .................... .................

MgO. ---------------------- --------------.

Na2O ........................................

KyO.... ....................................

Li92 O . .......... - . _ _^ _ . . _

B..O,

PA ---------------------------------------

A.a

34.82

55.30

trace

trace

.57

1.76

1.04

trace

4.07

2.96

100. 32

B.

31.44

68.91

trace

100. 35

C.

31.52

63.66

.52 .'37

.11

2.62

1.34

100. 14

D.

27. 99

64. 49

4.. 95

.20

1.72

99. 35

' Sample A contaminated by tourmaline.
CIjABKK.] SILICATES. 59

TOURMALINE.

Analyses A to V, inclusive, by R. B. Riggs. Discussed by Riggs in 

Bulletin 55.

A. Pink center of crystals having a green, margin, from Calhao, 

province of Minas-Geraes, Brazil. Specific gravity, 3.028.

B. Pale green, border of-A.

C. Olive-green, also from Calliao, Brazil.

D. Rose-colored, massive, from Black Mountain, Rumford, Me. 

Specific gravity, 2.997.

E. Dark green, massive, same locality as D.

Si02 . ............... .. -

u

ALA ------------------------------

FeA ------------------------------

FeO__ ............-.._...-..... -------

MnO. ..............................

MgO. -------- ......................

CaO_. .-----.------.---.:.----.---

Li.O. ............................. ..

NaA--------------------------------

KA _..._;........._............._.

PA -------------------------------

B.O,. ..............................

H8 0 -. --..- -- -.--. 

F ..................................

0 equivalent to F......... ..........

A.

37.19

42.43

none

.52

.79

none

. 57 -

1.73

2.24

23

10.06

3.90

99.66

--------

B.

37.39

39.65

.15

2.29

1.47

.49

1.71

2.42

.25

10.29

 3.63

.32

100. 06 

.13

99.93

C.

 36.91

38.13

.31

3.19

2.22

.04

.38

1.61

2.70

.28

.11

Q 87

3.64

14

99.53 

.06

99.47

D.

38.07

42 24

.26

.35

.07

.56

1 ^Q

2.18

44

9.99

4.26

.28

100. 29 

12

100. 17

E.

36.53

38.10

6.43

.32

none

.34

.95

2.86

'.38

10.22

o KO

.16

99.81 

.07

99.74
60 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BUM,. 220.

F. Alteration product of the Rumford tourmaline. 

G. Alteration product of rnbellite, from Hebron, Me. 

H. Colorless to very pale pinkish or greenish crystals, Anbnrn, Me. 

Specific gravity, 3.07. 

I. Light-green crystals, Auburn, Me. 

J. Dark green, massive tourmaline, Arbnrn, Me.

Si02 - - . - .

Al O

Fe2 03 ------------------------------

FeO. .................... ...........

MnO... -...--.-.- -..... -----------

MgO. .............. ................

CaO. ...................... --------

140 ------ ----------------

Na^O. ...... ...... ....... .----..---.

K2O

BA - - - . 

PO

HA--------- ---------------

F ......:.-..--..................

O equivalent toF-.......--.. .....

F.

53. 03

31.67

.51

trace

trace

' .26 .54'

9.44

trace

4.80

100.25

G.

43. 90

38.71

.58

.25

.04

.05

.41

1.05

10.92

trace

4 25

100.16

H.

38.14

39. 60

.30

1.38

1.38

.43

1.34

2.36

27

10.25

4.16

.62

100. 23 

.26

99.97

I.

37. 85

1 37. 73

.42

3.88

.51-

.04

.49

 " 1.34

2.16

62

10. 55

4.18

.62

100. 39 

.26

100. 13

J.

36.26

36.68

.15

7.07

72

,.16

.17

1.05

2.88

44

9.94

trace

4.05

.71

100. 28 

.30

99. 98
OLAUKIC.] SILICATES.

K. White- to light-brown crystals, Dekalb, St. Lawrence County, 

K Y. Specific gravity, 3.085. -

L. Brown tourmaline, Gouverneur, St. Lawrence County, 1ST. Y.

M. Cinnamon-brown crystals, Hamburg, 1ST. J.

lsr. Brilliant black crystals, Pierrepout, St. Lawrence County, 1ST. Y. 

Specific gravity, 3.08.

0. Dark-brown crystals, Orford, 1ST. H.

P. Dark-brown crystals, Monroe, Conn.

Si02 . ........................

TiO, .......................

A1A ---------------------

FeA -------------------

PeO................:...... ..

MnO. .................. .....

MgO.. ......................

CaO .........................

SrO. ................ ........

Li,O ........... ............

NaA---- ...................

K2 0.. .......................

BA --------------------

PA -------...-------

H2 0... ......................

FO equivalent to F ............

K.

36.88'

.12

28.87

.52

none

14. 53

3.70

trace

1.39

.18

10.58

3.56

.50

100. 83 

21

100. 62

L.

37. 39

1.19

27.79

.10

.64

 none

14.09

2.78

1 72

.16

10. 73

3.83

trace?

100.42

M.

35. 25

.05

28. 4.9

none

.86

none

14.58

5.09

trace

.94

.18

10. 45

3.10

.78-

100. 37 

.33

100. 04

1ST.

35.61

.55

25.29

44

8.19

trace

11.07

3.31

none

trace

1.51

.20

10. 15

3.34

27

99. 93 

.11

99. 82

O.

36.66

.23

32.84

none

2.50

trace

10. 35

1.35

trace

2.42

22

10. 07

3.78

100. 42

P.

36.41

1.61

31.27

none

3.80

trace

9.47

.98

trace

none

2.68

.21

9. 65

trace

3.79

none

99.87
62 MINEBAL ANALYSES BY U. S. GEOL. SUKVEY. [BULL.220.

Q. Massive, black tourmaline, Auburn, Me. Specific gravity, 3.19.

R. Massive, black tourmaline, Paris, Me.

S. Black tourmaline, Calhao, Brazil. Specific gravity, 3.20.

T. Black tourmaline, Haddam, Conn.

SiOa _.. ....... ............ ............

TiO2 ..........

ALA --

Fe2O3 ......... ............................

FeO. ........ ................................

MnO.. ----.-.. .

MgO.. ...... ....'....... ..------.-_-.----..

CaO..... ......... ..... .

Li2O . - . ...

Na2O-.-_ ............................... ....

K2O._ ......................................

BoO, - --- --- .-.--..

P,O5 -------

H2O.

F

O equivalent to F .......-.--.........-_....

Q.

34.99

none

33.96

none

14.23

.06

1.01

.15

2.01

.34

9.63

3.62

100. 00

R.

 35.03

34.44

1.13

12.10

.08

1.81

.24

.07

2.03

.25

9.02

3.69

none

QQ QQ uf/ * Ov

S. .

34.63

32.70

.31

13.69

12

2.13

.33

.08

2.11

24

9.63

none

3.49

.06

99.52 

.02

99.50

T.

34.95

.57

81.11

.50

11.87

.09

4.45

.81

trace

2 22

.24

9.92

trace

3.62

100. 35
CLA11KK.] SILICATES. 63

U. Black crystal, Nantic Gulf, Baffin Land. Specific gravity, 3.095.

V. Black crystal, Stony Point, Alexander County, N. C. Specific 

gravity, 3.13.

W. Brown tourmaline from near Colfax, Nevada County, Cal. 

Fine, radiating needles. Specific gravity, 3.065. Incomplete analysis by W. H. Melville. See Bulletin 90.

X. Chrome tourmaline from near Etchison, Montgomery County, 

Md. Analysis by T. M. Chatard. See Bulletin 64-..

SiOa . ........ ..'.................. ...........

TiOa -. ......

AI n

rv n

FeA ------ -.--------------------.------.--

FeO___........... __.- ... ..- -.. ..'.

MnO -.-.---..I...............................

NiO... -----------.. ......................

MP-O

CaO... ........ ........ -...-- -.... ..-..-

SrO. ........................................

LiaO . . ........ . ....

Na2O. ........'1............'.................

K2 0.----- ..................................

BA --... .- - ...............'.....

P,0r,

H,O.------------------- ------------------

F

O ecuiivaient to F ............... ............

U. '

85.34

.40

80.49

8.22

trace

7.76

2 32

trace

1.76

.1.5

10.45

3.60

none

100. 49

V.

35. 56

.55

33.38

none

8.49

.04

5.44

.53

trace

2. 16

.24

10.40

(?)

3.63

100. 42

W.

36.40

33.64

} 3.13

10. 01

1.51

2.49

.12

« 8. 74

8. 53

.74

100. 81 

.31

100. 00

X.

36.57

.09

32.58

4.32

,

} .79

trace

.05

9.47

' . 75

trace

2.22

.13

8.90

.04

3.74

.06

99.71 

.02

99.69

'By difference.
64 MINERAL ANALYSES BY U. 8. GEOL. SURVEY. [BULL. 220.

GYROLITE.

Associated, with, the apophyllite of JSTew Almaden, Cal. Fibrous. 

Analyzed by F. W. Olarke and described in Bulletin 64,

SiOa . .-.-.__..--........_.___.-._...__-. ................... 52.54

-~

CaO.... .............................. ....................... 29.97

K.,0 ._.---_.__ ....____._'___________.____.___._________._____ 1.56

Na2O-------.l- ------ .-----.-'----------------.-.----..--.... .27

F .....I......................... .......................... .65

Ignition .....I .......... ..^........... ....................... 14. 60

O equivalent to F.

100.30

.27

100.03

APOPHYLLITE.

From Table Mountain, Golden, Colo. Described by Cross and 

Hillebrand in Bulletin 20. Analyses by W. F. Hillebrand. 

A. Apophyllite. 

B. Decomposition product of apophyllite.

SiO2 .. ----------

A1A - - -......_..._._....._........'_........_.._...

FeA - - ----. . - - --- - - ----

CaO ..-._...--.............'.......... ...................

MgO ............ .........................................

K2O-.. -...'....... ........ ----- ----- ...

Na.,0-------- ............

H20... _.___ __..- .-.- -. - -

F . ..-.-

O equivalent toF . . . .__. -..--..--.---.---------..----.....

A.

51.89

1.54

.13

24.51

3.81

59

16. 53

1.70

100. 69

.72

99. 97

B.

67.96

8.48

1.04

5.47

.53

1.23

a. 74

14.55

none

100. 00

w By difference;,
CLARKK.] SILICATES. 

PTILOLITE.

Described as a new species by Cross and Eakiiis in Am. Jour. Sci., 

3d ser., vol. 32, p. 117, and vol. 44, p. 96. Analyses by L. G. Eakins. 

A. From Green Mountain, Jefferson County, Colo. 

B. From 3 miles south of Silver Cliff, Custer County, Colo.

SiO,. ....... ..............................................

AIA .. ....................... . -..... ...........:......

CaO ....................................i. ............

KjjO. -.- -- -------- ----.-...---.- ----....'.............

Na.2O .........I-..-..-............-----..-...........'.....

H2O at 110°.. ................... ..........................

H,0atl25°...... ......................... . HjO at 300°.... ........... ..............................'..

H2O at redness .... ....!.. ................................

A.

70.35

11.90

8.87

2.83 '.77

10.18

99. 90*

B.

67.83

11.44

3.30

.64

2.63

3.62

1.31

5.41

3.10

99. 28

HEULANDITE.

A. From Green Mountain, Jefferson County, Colo. Analysis by 

L. G. Eakins.

B. From Anthracite Creek, Gunnison County, Colo. Analysis by 

L. G. Eakins. Specific gravity, 2.24 at 20.1°.

C. From. Berufiord, Iceland. Analysis by George Steiger.

Si02 --' ..'........_.......................... .!..

AI n

FeA '-----.- --------------------------------

MgO.... .......................................

CaO. .......... --.-.-----.---._..--------..---

SrO. ......-..-.........-.........----.- --..--..

Na.O.. ....................... .'..... ............

Kj,0... ...... .......................... .'. ........

HaO at 1 1 0° .................:.........-......-..

HxOatl250 .....................................

H,O at 800°. ................................. .....

H20 at redness ..........-...-..........--..-.--.

A.

59. 17

16,80

7.10

1.37

.34

15. 45

100. 23

B.

57. 38

1.7. 18

trace

8.07

.82

.40

2.57

1.10

11.70

.90

100.12

C.

57. 10

16.82

.07

6.95

.46

1.25

.42

3.61

13. 00

99. 68

Bull. 220 03-
66 MINEEAL ANALYSES J*Y U. S. GEOL. SURVEY. [BULL. 220.

STILBITE.

A. From Wassons Bluff, near Parrsboro, Nova Scotia. Analysis 

by George Steiger. .

B. From Italian Mountain, Gunnison County, Colo. Analysis by 

L. G. Eakins.

C. From Table Mountain, Golden, Colo. Described by Cross and 

Hillebrand in Bulletin 20. Analysis by W. F. Hillebrand.

Si02 -.------.--- . ---- - -

A1A ------------------------------------------

FeA - . - -. .-. 

MgO..----.---- -.- --.. -- -- 

CaO _.-._.--- .- -__--- 

Na2O--._ ---------- .--.--------_.__-------...---

H2O at 100°. -..-.-.----__---_----_._:. -

H2O above 100°.. .._... . ................_.....

A.

55.41

16.85

.18

.05

7.78

1.23

3.60

15. 41

100. 51

B.

57.75

16.64

8.58

trace

| 17.17

100. 14

C.

54.67

16.78

7.98

1.47

| 19. 16

100. 06

From Table Mountain, Golden, Colo. Described by Cross and 

Hillebrand in Bulletin 20. Analyses by W. F. Hillebrand. 

A. Yellow grains. 

B. White crystals.

Si<V_. -------._----___. -. ._____ _ __

A1 O

FeA--------------- ------------------------------

CaO. -------------- --------.-.'.--- -. ---------.

K20_-------- ------------------------------------------

yfayO ............. ----- .-..--. - ---_.---..__

HA-.. .--------.--,-- - - - ----- -

A.

51.43

21.52

.94

11.88

.35

.19

13.81

100. 12

B.

' 52.07

21.30

11 24

42

.48

14. 58

100. 09
CLAKKM.] SILICATES. 

CHABAZITE.

67

A. From Wassons Bluft', near Parrsboro, Nova Scotia. Analysis 

by George Steiger.

B, C. From Table Mountain, Golden, Colo. Described by Cross 

and Hillebrand in Bulletin 20. Analyses by W. F. Hillebrand.

SiO,.... ........................................

ALO, . .....

FeA .........-... .................. '..... ..

MgO ...........................................

CaO............. ............... ..............

SrO . ---'.. -. -.-.... ......... ....L.. ....

NaaO......-....... ....... ....................

KjO..--------------.- : -.---.--

H2O at 100°.. ...................................

HijO above 100° ----------..__---....._.....____.

A.

50.78

17.18

.40

.04

7.84

1.28

..73

. 5.22

16.63

100. 10

B.

47.86

19.30

.12

1 9.94

.52

.35

| 22. 07

100. 16

C.

47.18

19.67

9.74

.43

.51

.37

4.76

17.39

. 100.05

LEVYNITE.

From Table Mountain, Golden, Colo. Described by Cross and 

Hillebrand in Bulletin 20. Analyses by W. F. Hillebrand. 

A. Crystals of levynite. 

B. Associated fibrous variety.

SiO.... ......... ............. .._.._...-.....-......_.---.

AT O

CaO .......................................................

K,O---.- ................................................

Na.O.. ...................................................

HaO... .................................................

'

A.

46. 76

21.91

' 11.12

.21

1.34

18.65

99.99

B.

46.97

22.39

10.85

1.17

.79

18.03

100.20
68 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL. 280. 

ANALCITE.

A. From Wassons Bluif, near Parrsboro, Nova Scotia. Analysis 

by George Steiger. See Bulletin 207.

. B. From Table Mountain, Golden, Colo. Analysis by George 

Steiger. See Bulletin 207.

0, D. From Table Mountain. Described by Cross and Hillebrand 

in Bulletin 20. Analyses by W. F. Hillebrand.

SiO,. ........................... ........I...

A1A ----------------

Fe2O3 _ . ..___. . 

CaQ - - ., -----

Na2O._ .....................................

H2O at 100°.. ...............................

H20 above 100° .............................

A.

57.06

21.48

.13

.16

12.20

.58

8.38

99.99

B.

55.72

^ 23.06

.17

12.46

.13

8.26

99.80

c.

55.82

22.42

13.48

| 8.38

100. 10

D.

55. 80

22.45

13.45

| 8. 35

100.05

NATROLITE.

A. From Bergen Hill, New Jersey. Analysis by George Steiger. 

See Bulletin 207.

B. From Magnet Cove, Arkansas. Analysis by W. H. Melville. 

Described in Bulletin 90. Specific gravity, 2.261.

C. From South Table Mountain, Golden, Colo. Described by Cross 

and Hillebrand in Bulletin 20. Analysis by W. F. Hillebrand.

QK)2 . ...........................................

A1203 - ------------------------------------------

FeA ............ . ........... .. . . 

CaO. ...........................................

M^O

Ng^O.... .................................. '.....

H2O at 100°. ....................................

H2O above 100° ......._......:..................

CO......... ......... ......... ....... ..I ....

A.

46. 62

26. 04

none

1.48

none

15.67

.39

10. 18

100. 38

B.

47.56

26.82

.23

.13

.09

15.40

.07

9.56

99.86

C.

43. 66

24.. 89

 4.87

14.66

«8.09

&3.83

100. 00

« By difference. Too little material for complete analysis, 

b Calculated to satisfy total line.
CLARKK] SILICATES. 

SCOLECITE.

69

A. From Whale Cove, Grand Manan, New Brunswick. Analysis 

by George Steiger. See Bulletin 207.

B. From Italian Mountain, Gmmison County, Colo. Analysis by 

L. G. Eakins. Specific gravity, 2.247 at 17.2°.

C. From Table Mountain, Golden, Colo. Described by Cross and 

Hillebrand in Bulletin 20. Analysis by W. F. Hillebrand.

Si02 ... .........................................

Ay), ...................... ..---........;-.:..:

FeA --------------------------------------

CaO ...........................................

MgO ...........................................

Na,0. ------ ....................................

K2O....... ....................................

EsO.a* 100°...... ...............................

H2O above 100°.. ...............................

A.

45.86

25. 78

13.92

.41

.40

13.65

100. 02

B.

45.90

26.51

14,17

trace

trace

13.79

100. 37

C.

 46. 03

25. 28

.27

12 77

1.04

.13

V « 14. 48

100. 00

« By difference.

MESOLITE.

From North Table Mountain, Golden, Colo. Described by Cross 

and Hillebrand in Bulletin 20. Analysis by W. F. Hillebrand.

Si02 .................................................. ...... 46.17

A1A----------------------------------------------------- 26.88

CaO-.................................................... ..-.-.------.....-..-...---.......-..-.,--........---.- 8.77

Na2O---.----...-------------------.------------ 6.19

H2O........................................................ 12.16

100.17
70 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL.280.

THOMSONITE.

From Table Mountain, Golden, Colo. Described by Cross and 

Hillebrand in Bulletin 20. Analyses A, B, C, D, E by W. F. Hillebrand.. Analysis F by George Steiger; published in Bulletin 207. A 

represents reddish spherules; F, a mass of fibrous structure.

Si02 ........................

A1203 .......................

FeA ---------- ------------

CaO ........................

NajO...... ..................

HP at 100° .................

H2O above 100° ...............

A. ,

40. 52

29. 22

.79

12.43

4.31

} 12. 79

100.06

B.

40.88

29.68

11.88

4.72

| 12. 91

100. 07

C.

40.68

30.12

11. 92

4.44

} 12.86

100. 02

D.

41.21

29.71

11.34

5.62

| 12.20

100. 08

E.

42.66

29.25

10.90

4.92

| 12.28

100. 01

F.

41.13

29.58

11.25

5.31

1.01

12.12

100.40

H YDRONEPHELITE.

From the elseolite-syenite of Litchfield, Me. Described by Clarke 

as a new species in Bulletin 42. Analyses by F. W. Clarke. Specific 

gravity, 2.263, determined by J. S. Diller.

A, B. Slightly impure. Two distinct samples.

C. Carefully purified material dried at 100°.

Si02 _. ------- .................... ---------

A1A ... ...... ............ ....................

FeA ----------------------------------------

CaO. .. -. - 

Na2 0.----- ----------------------- -----------

K2O ............................................

H2O. ...........................................

A.

88. 90

33.98

trace

.05

13.21

1.01

13.12

100. 27

B.

39.24

33.16

13.07

.88

13.80

99. 65

C.

38.99

33.62

.07

13.07

1.12

12.98

99.85
CLARKffi.] SILICATES.

MUSCOVITE.

A. From the Hatch farm, Auburn, Me. Broad plates, bordered by 

lepidolite. Analysis by K. B. Riggs.

B. Greenish muscovite, Auburn, Me. Analysis by E. A. Schneider.

C. Altered muscovite, Mount Mica, Paris, Me. Occurs as a white 

enamel on ordinary mica. Analysis by F. W. Clarke.

D. Well-crystallized muscovite from the liiddenite mine, Stony 

Point, Alexander County, N. C. Analysis by F. W. Clarke.

E. White muscovite from Miask, Ural Mountains, Siberia. Analys is 

by E. A. Schneider.

F. Mica separated from quartz-schist. Shoemaker's quarry, near 

Stevenson Station, Green Spring Valley, Maryland. Analysis by 

E. A. Schneider.

G. Mica from the Eureka tunnel, St. Peters Dome, near Pikes

Peak, Colorado. Analysis, by W. F. Hillebrand. See Bulletin 20.

Si(V -. 

TiO

A1A .-.-..._..- 

FeA -------------

FeO. ...............

MnO'... .......... .

MeO

CaO. .............. -

Li,O .............. -

Na,0.. .............

KjO.. ..... ......

HjOatlOO0 ........^

H.jO above 100°.....

F .;.... ............

A.

44.39

35.70

1.09

1.07

.10

2.41

9.77

} 5.88 

.72

101. 18 

.30

100.83

B.

46.54

none

34.96

1.59

.32

.41

10.38

.71

4.72 

none

 99.63

C.

46.61

1 35. 61

trace

1.76

. 8.86

} 6.50

99. 34

D.

45. 40

' 1.10

33.66

2.36

1.86

trace

1.41

. 8. 33

| 5.4.6 

.69

100. 27 

.29

99.98

E.

44.17

37.35

1.29

" .20

. .10

1.14

10.00

1.06

4.67 

.90

100. 88 

.37

1.00. 51

F.

44.93

1.05

29.81

\ 6.10

1.1.6

trace

.50

10.28'

1.88

4.88 

.22

100.31 

.09

100. 22

G.

52. 59

29.72

1 1.40

2 12

.26

..50

8.33

| 4.39

99.31
72 MHSTEKAL ANALYSES BY U. S. GEOL. SURVEY. [BULL,.220.

H. Fuchsite. Etchison post-office, Montgomery County, Md. Analysis by T. M. Chatard. See Bulletin 64.

I. Grayish-green, compact mica from Stoneham, Me. Structure 

subfibrous. Analysis by T. M. Chatard.

J. Same locality as I. Specimen broadly foliated, micaceous. 

Analysis by T. M. Chatard. For analyses I and J see Bulletin 0.

K. Stoneham, Me. From alteration of topaz, the outer portion of 

an altered crystal. Specific gravity, 2.82. Analysis by J. E..Whitfield. Discussed by Clarke in Bulletin 27.

L. Pseudomorph from the Rochelle mine, on Running Water River, 

Wyoming. Near liebenerite. Specific gravity, 2.831 at 12.5°. Analyzed by W. F. Hillebrand and described in Bulletin 20.

M. Mariposite. From vein of the Josephine gold quartz mine, 

Bear Valley, Mariposa County, Cal. Color, green. Specific gravity, 

2.817 at 29.5°.

N. White mariposite, same locality as M. Specific gravity, 2.787 

at 28.5°. Analyses M and 1ST by W. F. Hillebrand, and described in 

Bulletin 167.

Si02 -. ..............

Ti02 ...............

A12O3 ..............

Pr O

FeA --------..----

FeO.... ............

MnO........ .......

CaO ............._.

MgO _..__'. .....I....

Li,0 ...............

Na2 0.._ ............

K2O... .............

H2O at 110° :.____. ..

H2O above 110° .....

F ...... ...........:

O equivalent to F. . .

H.

42.21

34.55

2.03

-i 1.03

trace

.47

3.13

.82

9.16

.20

6.57

100. 17 -

I.

45.19

33.32

4.25

.58

trace

.36

1.57

11.06

| 4.48

100.81

J.

45.34

33.96

3.96

.51

.22

..10

1.49

10.73

| 4.78

101.09

«

K.

44. 52

46. 19

.21

.30

.14

2.82

2.30

\ 3.74

.40

100. 62 

.16

100. 46

L.

45.54

37.15

.79

.38

.90

10.70

V 4.80

100. 26

M.

55.35

.18

25.62

.18

.63

.92

.07

3.25

12

9.29

| 4.52

100. 13

ir:

56. 79

/ 25. 29

-» 1.59

.07

3.29

trace

.17.

8.92

1 4. 72

100. 84
CLAHKE.] SILICATES.

LEPIDOLITE.

From various localities in Maine. Analyses by R. IB. Riggs. 

cussion by F. W. Clarke in Bulletin 42.

A. From Black Mountain, Rumford. Lilac-purple, granular. 

B. From Mount Mica, Paris. Broadly foliated. 

C. From Hebron. Purple, coarsely granular.

Purple border on plates ol: muscovite.

Purple, coarsely granular.

White, coarsely granular.

Brownish, finely granular.

DisD. From Auburn. 

E. From Auburn. 

F. From Norway. 

G. From Norway.

Si02 . ...............

A1A ..............

FeA --------------

FeO ...............

MnO. ..............

CaO ................

MgO. ..............

LiaO. .......... ....

Na2 0... ............

K2 0.._. ............

Rb.O. ..............

Csj,O-..---. ........

HjO... .............

F. .................

O equivalent to F . .

A.

51.52

25.96

.31

undet.

.20

.16

.02

4.90

1.06

11.01

.95

5.80

101.89 

2.44

99.45

B.

50.92

24.99

.30

.23

trace

4.20

2.11

' 11.38

trace

trace

1.96

6.29

102. 38 

2.64

99.74

C.

48.80

28.30

.29

.09

.08

.10

 .07

4.49

.74

I 12.21

f 

1.73

4.96

101.86 

2.02

99.84

D.

49. 62

27.30

.31

.07

.55

4.34

2.17

8.03

2 44

.72

1.52

5.45

102. 52 

2.29

100.23

E.

51.11

25.26

.20

, .07

.17

12

.01

4.98

1.43

10.51

1.29

.45

.94

6.57

103. 11 

2.76

100. 35

F.

49.52

28.80

.40

24

.07

.13

.02

3.87

.13

8.82

3.73

.08

1 72

5.18

102. 71 

2.18

100. 53

 G.

50. 17

25.40

.87

.45

.23

undet.

undet.

4.03

13.40

2 02

5.05

101. 62 

2.13

99.49
74 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL. 220. 

CRYOPHYLLITE.

From Rockport, Mass. Analyses by R. B. Riggs. Discussed by 

Clarke in Bulletin 42.

A. Brilliant, broadly foliated, blackish-green variety. 

15. Paler, dull green, less lustrous, probably somewhat altered. 

C. Granular, resembling chlorite.

sio.,.:. -------- --.-I.------:.: -. .._'.._........

A1A .. . .. . .... . .:._ -____

Fe203 '... ...........-........ ......... .';.'.. 

FeO... .- ------ ------------------ ..'.. .........

MnO ...........................................

CaO_. ..........................................

MgO. ............ .......... ....................

Li2O ............................................

NajO.------ - --- ------ ._-.-..-

JSL^O.. ..........................................

HaO. ...... ....................... ..!'...........

F ..............I. ......._.... ...

O equivalent toF ..---.---..-..................

A.

51.96

16.89

2.63

'6.35

.24

.12

.03

4.93

.92

10.66

1.22

6.78

102. 73 

2.86

99.87

B.

51.46

16. 22

2.21

7.66

.06

trace

.17

4.83

.95

10.65

1.06

7.44

102. 71 

3.11

99. 60

C.

' 52. 17

16. 39

4.11

6108

.32

trace

trace

5.03

.60

10.54

1.43

7.02

103. 69 

2:95

100. 74

BIOTITE.

A. From Merrow Ledge, Auburn, Me. Black. Analysis by F. W. 

Clarke and R. B. Riggs.

B. Bronze-mica, Laurel Creek corundum mine, Rabun County, Ga. 

Analysis by E. A. Schneider. The loss is due to undetermined volatile matter.

C. Brown mica from the granite of the Yosemite Valley, California. 

Analysis by William Valentine. Described by Turner, Am. Jour. 

Sci., 4th ser., vol. 7, p. 294.

D. Mica from quartz-monzonite, Tioga road, southeast of Mount 

Hoffman, Mariposa County, Cal. Specific gravity, 3.05 at 21°. Analysis by W. F. Hillebrand. Described by Turner, loc. cit.
CLARICE.] SILICATES. 75

E. Black mica from quartz-monzonite. About 1 kilometer south of 

Bloods Station, Alpine County, Cal. Analysis by William Valentine. 

Described by Turner, loc. cit.

1?. Reddish-brown mica from pyroxenic gneiss. North fork of 

Mokelumne River, above-mouth of Bear River, Amador County, Cal. 

Analysis by William Valentine. Described by Turner, loc. cit.

G. Biotite from the granite of Butte, Mont. See Weed, Jour. Geol., 

vol. 7, p. 737. Analysis by H. 1ST. Stokes.

SiCX,. ..-...- ....---

TiD

ALA ..----.....-.-

V2 0S -----------

CI-A ------------

FeA ..............

FeO.... .......... ..

MnO. ...............

NiO.... ........ ....

CoO-.-. ............

CaO...... ..........

SrO.. ....... .......

BaO ...... .......A.

MgO- ..............

LiaO ..-_.-..-.---

Na.O. -------------

KS.O.. ...... ........

HaO at 105° --...---'.

HaO above 105.°.----

p n

F ..................

CL... ..............

LessO .............

A.

34.67

30.09

2.42

16.14

.85

none

1.98

1.67

7.55

| 4.64

.28

100. 29 

.12

100. 17

B.

36.12

1.18

20.49

3.29

5.17

.17

.34

.28

.09

19.61

trace

.78

8.14

1.58

.82

.60

98.66 

.26

98.40

C.

35.64

1.12

18.62

5.54

14.60

'.79

.90

trace

9.72

trace

.38

9.22

.48

2.54

.20

.26

100. 01 

.11

99.90

D.

35. 75

3.16

14.70

.05

trace

4.65

14.08

.45

| .02

.17

(?)

.12

12.37

.32

9.19

1.03

3.64

.03

.17

99.90 

.07

99.83

E.

35. 62

9 'fi1

15. 24

4.69

13.67

.74

.95

trace '

.26

12.70

trace

.50

7.72

.94

4.36

none

none

100. 00

F.

36.62

3.03

14.37

4.04

17.09

.40

1.48

trace

.33

9.68

trace

.45

8.20

.90

3.26

none

.10

99.95 

.04

99. 91

OK

35.79

3.51

13.70

5.22

13.72

.19

.05

.13

12.13

trace

.15

9.09

1.21

3.64

.10

.76

.20

99.59 

.37

99.22
MINERAL ANALYSES BY U. S. GEOL. SUKVEY. [BULT..220.

PHLOGOPITE.

A. From Edwards, St. Lawrence County, N". Y. Outwardly resembles talc. Analysis by E. A. Schneider. Discussed.by Clarke and 

Schneider in Bulletin 78.

B. From Burgess, Canada. Brown. Analysis by E. A. Schneider. 

See Clarke and Schneider, Bulletin' 78.

C. Phlogopite separated from the wyomingite of the Leu cite Hills, 

Wyoming. Described by Cross in Am. Jour. Sci., 4th ser., vol. 4, p. 

115. Analysis by W. F. Hillebrand.

The following micas of doubtful character occur in serpentine. 

Analyses by Charles Catlett. See Bulletin 64.

D. Brown mica, from the serpentine of Montville, N. J.

E. Yellowish mica, same locality as D.

F. White mica, same locality.

G. White mica from near Easton, Pa. 

. E, F, and G are perhaps to be called vermiculites rather than micas.

SiO2 .._. ---._.--..

TiO2 .... i__ -..-..

A12O3 .-.-- ....---.

Pr O

Fe2O3 ..............

FeO--. -- -1-.

CaO .'..............

SrO :.--:.- --------

BaO ......__ _._....

MgO.. ..........

Li2O ...............

Na,0 - - .

K2O-_. -------------

H2O at 105°... ._.....

H2O above 105°--.. .

CO,...-.. ----------

P n

F .. ....... .

O equivalent to F .

A.

. 45.05

11.25

.14

29.38

.07

.45

.8.52

| 5.37

100. 23

B.

39. 66

.56

17. 00

.27

.20

none

.62

26.49

.60

9.97

.66

2.33

trace

2.24

100. 60 

.94

99. 66 -

. C.

42.56

2.09

12.18

.73

2.73

.90

.20

trace

1.00

22.40

trace

.44

10.70

2.35

.06

2.46

100. 80 

1.03

99. 77

D.

39.38

15.92

.71

.80

. .28

26.85

.62

9.84

.38

4.69

.30

.62

100.39 

.26

100.13

E.

32. 52

18.14

-> 2.30

1.44

29.26

1.38

2.78

10. 12

1.80

100. 50

F.

39.14

15.70

1.68

5 24

25.44

.64

'2.06

i.io

9.10

100. 10

G.

41.82

11.12

2.68

29.82

.36

6.08

.94

7.10

99.92
SILICATES. 77

LEPIDOMELANE.

A. From Litchfield, Me. Analyzed by F. W. Clarke, and described 

in Bulletin 42.

B. Same as A. Later analysis by Clarke. See Bulletin 55.

C. Aunite. From Rockport, Mass. Analysis by R. B. Riggs. 

Discussion by Clarke in Bulletin 42.

D. From Port Henry, N. "Y. Analysis by E. A. Schneider. See 

paper by Clarke and Schneider in Bulletin 78.

E. From Baltimore, Md. Analysis by F. W. Clarke, and discussed 

in Bulletin 55.

F. From near Pikes Peak, Colorado. Siderophyllite? The slightly 

altered margin of a large crystal.

G. Much altered central portion of specimen F. Analyses F and 

G by F. W. Clarke and R. B. Riggs. Described by Clarke in Bulletin 

55. Classed by Dana under biotite.

SiOa ...............

TiO

A1A --------------

FeA ---------

FeO ...............

MnO. ..............

CaO .................

MgO. ..............

NiO.CoO. ..........

Li.O. ..............

Na.,0 --------------

Kj.0-. . ------------

H2Oatl05°-. ....... 

H2O above 105°.....

p o

F. .................

A.

32.09

18.52

19.49

14.10

1.42

1.01

1.55

8.12

| 4.62

none

100. 92

B.

32.35

trace

17.47

24.22

13.11

i:02

none

.89

.70

6.40

| 4.67

none

100. 83

C.

32.03

3.42

11.92

8.00

30.41

.21

.23

.06

trace

1.54

8.46

I 4.19

trace

100. 47

D.

34.52

2.70

13.22

7.80

22.27

.41

none

5.82

.30

.04

.16

8.59

.57 

3.82

trace

.34

100. 56 

.14

100. 42

E.

35.78

16.39

14.55

11.02

1.08

none

8.67

.56

7.76

| 4.48

none

100. 29

F.

34.21

16. 53

20.15

14. 17

.91

.48

1.34

1.43

6.50

} 4. 54

.08

100. 84 

.03

100. 31

G.

34.63

17.95

31.25

3.01

.34

.81

1.08

.89

1.96

| . 7.82

.54

100. 28 

22

100.06
78 MiNEKAL ANALYSES BY U. S. GEOL. SUKVEY. [uuj;i-.220.

ROSCOBLITE.

Analyses by W. F. Hillebrand.

A. From the Stockslager mine, near Lotus, Eldorado County, Cal. 

Described by Hillebrand in Bulletin 167.

B. Soluble portion of a vanadiferous sandstone from Placerville, 

Colo. Described by Hillebrand in Am. Jour. Sci., 4th ser., vol. 10, 

p. 130.

SiO, . . . . -----

TiO,

AI r>

V,O« - - - -----

Fe,Oo - ...

FeO. ---------------------------------------------- ------

CaO,.-------:---.-----.---------- ------------ -.t. ------

BaO.-- ----------------- ..------------------- -------...-----

MffO

Li2 0 ..-- .---...--.-.-----.-.. ------.--------.-..-.-.

Na2O-._- -----------------------:.------------.--.--- -----

K3 0 ---- -- - - --. --- 

ILtOAtlOQ0 .... ...........................................

H2O above 100°. ................. J....... ..................

A.

45.17

.78

11.54

24.01

1.60

1.64

10.37

.40

4.29

99.80

B.

46. 06

22. 55

12.84

.73

.44

1.35

.92

.22

8.84

1.98

4.07

100.00

MAKGAB1TE.

A. Brownish yellow, from Iredell County, 1ST. C. Analysis by T. M. 

Chatard. See Bulletin 9.

B. Bright green, associated witli pink corundum. From Gainesville, Ga. Specific gravity, 3.00. Analysis by T. M. Chatard. See 

Bulletin 9.

C. Inclusion in diorite, Crugers Station, near Peekskill, N. Y. Analysis by T. M. Chatard.

SiO.------------.--...-----------..---..----------

AI r>

FeO..-- ... .........-.....---.-......... ---- ..

MgO - - . '.... 

CaO---.------ ----------------------------- ---.

Na2 0_. .------..-..-------.-- ------- ------------

H2O at 1 10° ......................................

H2O above 110° ............._...................

A.

31.15.

49.51

trace

.45

11.13

2.74

| 5.68

100. 66

B.

31.72

50.03

trace

.12

11.57

2.26

| 4.88

100. 58

0.

32.73

46.58

5.12

1.00

11.04

.12

. 4.49

101.08
<"<AUKK.] SILICATES. 79 

' CHLOKITOID.

From a phyllite rock near Liberty, Md. Analysis by L. G. Eakins. 

See Bulletin 168, p. 50.

SiOj........................... ... . ......................... 23.40

AL,03 ------------------------------------------------------- 39.31

Fe2O3 ------------------------------------------------------- 5-14

FeO.......................................................'.. 21.94

- MgO...........-------------------------.----.-----.--.-- 2.18

CaO.---.----..--...-...--...------..-.----..-.--.-.-.-.... trace

Na.O. ................ ................................... .20

K^>................................................... ..... .20

HJ.O ...:.................................................... 6.81

TiOj............................................'............. 1.19

MnO .................................................. ... . trace

P.j05 ---------------------------------------------- ---.------ trace

100.37 

XANTHOPHYLLITE.

Variety waluewite, from the Nikolai-Maximilian mine, "district of 

Slatonst, Urals, Siberia. Analysis by E. A. Schneider. Discussion 

v by Clarke and Schneider in Bulletin 113.

SiOj,..........1....................-..'...-.....--.-.---...-. 16.85

Ti02 --------.. .--..-----------_--------------.---..----------- trace

A1A------------------------------------------------------ 43- 33

Fe2 03 ------------------------------------------------------ 2.35

,-,J FeO......-.----..---..---....--..----------.--. ............ .20'

: CaO--...---..-----.---..---..---.-----...---------------.--. 13.30

,' MgO..----.-----...---...--..------.-----.-.-..--.-.-..-:--- 20.77

.y H2 0 at 105°------ ..........................................^. .04

H,O above 105°..........._...........-........................ 4.56

! 100.40 I

H . ' 

/? .
80 MINERAL ANALYSES BY U. 8. GEOL. SURVEY.. [.BULL. 280.

THE VEKMICULITES.

A. Jefferisite, from Westchester, Pa. Analysis by E. A. Schneider. 

Discussed by Clarke and Schneider in Bulletin 78.

B; Vermiculite, near jefferisite or culsageeite, from Corundum Hill, 

North Carolina. Analyzed by T. M. Chatard and described by him.in 

Bulletin 42. .

C. Altered biotite from the zircon mine, Green River, Henderson 

County, 1ST. C. Analysis by E. A. Schneider. Discussed by Clarke 

and Schneider in Bulletin 90.

D. Kerrite, from near Franklin, Macon County, N". C. Analysis by 

E. A. Schneider. Discussed by Clarke and Schneider in Bulletin 78.

E. Lucasite. Described as a new species by. Chatard in Bulletin 

42. Analysis by T. M. Chatard. From Corundum Hill, North Carolina. Specific gravity, 2.613 at 25.5°.

Si08 . --...- . ---.---.-.------------.

TiOa -... ... I... .. ...........

A12OS

Cr2 03 ...i.. __._.-......--......_.

FeA ----------------.------,---

FeO.. ..............................

MnO.... ................. ..........

NiO.'-.-.. ...........................

C6O. ...............................

'CaO....:.... .- -.. .-

BaO ...............................

MffO

Na,O. '..........................I...

K20_. ....,..'...................,....

H2O at 105°.. ........ ...............

H2O above 105°...-.... ............

A.

34.20

16.58

7.41

1.13

20.41

i 21.14

100. 87

B.

37.96

22.53

11.12

.30

.12

15.46

xindet.

} 12. 63

100. 12

C.

38.18

1.68

14.02

13.02

2 22

.38

.17

.06

14.62

.48

5.40

3.20

7.32

100.75

D.

38.13

11 22

2 28

. .18'

.48

.27.39

} 20. 47

100.15

E.

39.81

12.99

.54

5.29

.11

.05

.14

24.83

.20

5.76

3.78

6.98

100. 48
CLARICE.] SILICATES. 81

F. Hallite from Nottingham, Chester County, Pa. 

G. White lennilite from Lenni, Delaware County, Pa. 

H. Brown lennilite, same locality. 

I. Green lennilite, same locality.

Analyses F to I by E. A. Schneider. Discussion by Clarke and 

Schneider in Bulletin 90.

SiO... ......................................

TiOa .......I.....:...........-..............

A1A -------------------------------------

Fe,0«

Cr8O8 ......................................

FeO .- -.-..- .-.-.-'. '-.-..-....

MnO ------------ .- -------.--. .---.-..-..

NiO. ............ ...........................

MgO ........................................

BaO..... ................ ....................

H.,0 at 105°...... '.............................

HaO above 105° .............................

F.

35.54

tindet.

9.74

9.07

OC

.25

.16

30. 05

2.64

12. 14

99.87

a.

86. 72

.18

10.06

5.37

.26

.12

.31

. .20

29.40

6.40

11.37

100. 39

H.

35. 09

.58

12.05

6.67

.46

.11

27

.20

27. 62

trace

5.70

11.20

99.95

I.

34'. 90

.10

10.60

8.57

.23

.22

.17

.19

28.21

4.99

11.48

99.66

Bull. 220 03-
82 MINERAL ANALYSES BY U. S. G-EOL. SURVEY. [HULL.230.

J. A veriniculite from Newlin, Chester County, Pa.

K. Painterite from Middletou, Delaware County, Pa.

L. Another sample of painter!te.

Analyses J, K, L by E. A. Schneider. Discussion by Clarke and 

Schneider in Bulletin 90.

M. Hydromica from Rocky Hill, N. J. Analysis by G-eorge Steiger. 

Described by Clarke and Darton in Bulletin 167.

N. Analysis M corrected by deduction of calcite, union of like 

radicals, and recalculation to 100 per cent.

0. Protovermiculite from Magnet Cove, Arkansas. Analysis by 

E. A. Schneider. Discussed by Clarke and Schneider in Bulletin 90.

Si02 -.-.. ....... .............

TiO2 ........................

A1A ........................

OA ---. .- ... -----------

FeA---- ------------------

FeO.... .....................

MnO... .....................

NiO.. .......................

CaO ............ ............

MgO--.:.. ..................

NaA--- .....................

KjO.... .....................

H.,0 at 105° ..................

H2O above 105° ..............

C02 -...-- -.---..-'.--

J.

31.23

IP. 52

.14

4.70

1.20

.20

.33

31.36

1.08

12.55

100.31

K.

34. 86

trace

11.64

3.78

.20

.14

.07

31.32

1.64

16.78

100. 43

L.

33. 95

trace

12.52

4.40

.20

.23

none

30.56

1.56

17.05

100. 47

M.

32.72

.24

8.41

19. 99

4 24

10'. 30

5.51

.63

 .85

2.47

6.22

8.21

99.79

N.

40 24

10.34

24 57

5.21

6.78

2.20

3.03

7.63

100. 00

0.

34.03

Tindet.

14.49

 7.71

.14

.09

1.88

20. 89

fl.23

9.96

100. 42
CLAItKK.] SILICATES. 83

P. Cliloritic vermlculite from Corundum Hill, North Carolina. 

Q. Altered chlorite from Corundum Hill. Analyses P, Q by T. M. 

Chatard. Description in Bulletin 42.

Si02 .. ........................... ..^.... ..........'........

A1A .......... . ..... .. ... ... .. . ... . ..

FeA ....................................................

FeO...:........ ..........................................

MnO. ..'..................................................

CaO.... ....................... ........................ .

MgO .....................................................

Alkalies. -----.....:. ........ ...........................

EjOatllO0 ..... .. .. .. .. ... ........ ... .. ..

H,,O above 1 10° ...........................................

p.

35.88

20.90

6.55

3.68

.14

19.90

} 12. 71

99.76

Q.

32.97

17.88

4.76

 .57

trace

none

22.36

undet.

11.42

10.05

100. 01

CLINOCHLOKE.

A. From Westchester, Pa. Broadly foliated. Analysis by E. A. 

Schneider. Discussed by Clarke and Schneider in Bulletin 78.

B. From the Nikolai-Maximilian mine, district of Slatoust, Urals, 

Siberia. Analysis by E. A. Schneider. Discussed by Clarke and 

Schneider in Bulletin 113.

C. Leuchtenbergite from Slatoust. Analyst and reference as 

under B.

D. Kotschubeite from Green Valley, American River Canyon, California. Specific gravity, 2.69. Analysis by W. H. Melville. Described by Melville and Liridgren in Bulletin 61.

SiO,. .......................................

AI r>

CoA ---- ...-...--.-.-.-.-...-.---.--

FeA ......--...-.--.....-.-....---......-.

FeO. ..................... .................

NiO.................................. ......

CaO--.'.................... .._.-...--..-----

MgO .....-......-...-._...'........-

H2O at 105° .................................

H2O above 105°...... ..........'..............

A.

29.87

14. 48

1.56

5.52

1.93

.17

33.06

| 13.60

100.19

B.

30.84

18.31

1.94

1.08

34.38

.55

13.33

' 100.43

C.

30.00

20.43

1.68

.14

21

34.26

.55

13.20

100. 47

D. '

31.74

6.74

11.39

1.23

.49

.18

35.18

.37

12.68

100. 00
84 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL. 220.

PROCHLORITE.

From the Aqueduct Tunnel, Washington, D. C. Analysis by E. A. 

Schiieider. Described by Clarke and Schneider in Bulletin 78. 

SiOt-.................... ............................I....... 26.40

A1A------------------------------------------------------- 22.80

FeA------ ---------------------------------------- 2.86

FeO............ ...................1........................ 17.77

MnO ......................................................... .25

MgO ..................I..................................... 19.09

H20 at 105°.. ......^...........................1............. .80

H2O above 105° ............._....-............................ 11.41

F-.-.---..---..---..--........ .'.............-................ trace

100.38

SERPENTINE.

A. From ISTewburyport, Mass. Analysis by F. W. Clarke.

B. Same locality as A. Analysis by E. A. Schneider. Discussion 

by Clarke and Schneider in Bulletin 78.

C. Serpentine derived from sahlite, Osburn's soapstone quarry, 

Blandford, Mass. Analysis by W. F. Hillebrand. 

. D. Dark-green, oily serpentine, Middlefield, Mass. Analysis by 

W. F. Hillebrand.

E. Serpentine derived from enstatite, Granville, Mass.

Analysis by George Steiger. Serpentines C,. D, E are described by 

Emerson in Monograph XXIX.

SiOa ........ .....................

Ti02 . ..............................

ALA 

CrA , 

FeA -------------------------

FeO.-. ......... ....................

MnO.--.--.. ....................

NiO.. ...............................

CoO_. --..---. --------------

CaO... ... ...

MgO............... ........ ..........

Li2O .................... ...........

NajO . 

K2O. ----------------------

Hj,0 at 110°. . . 

H2O above 110° __..__... ......_..___

PA ------------------------

CO,.. ......... ........ ..... ....

A.

41.32

2.36

41.49

I 14. 54

99.71

B.

41.47

1.73

.09

none

41.70

1.20

13.86

100. 05

C.

40.77

none

1.16

.28

3.56

1.47

.09

.17

none

39.37

trace

.14

.10

.49

12.48

trace

none

100. 08

D.

38.62

none

.35

.39

3.44

3.99

.10

.21

.40

40.61

trace

.10

.08

.36

10.91

trace

.52

100. 08

E.

37.82

trace

.61

.19

7.92

1.15

.45

.05

none

37.94

trace

trace

.75

12.50

trace

99.38
CLARKTC.] SILICATES. 85

F. Rich, dark-green serpentine, Rowe, Mass. .

G. Black serpentine containing marmolite, Atwater's quarry, Russell, Mass.

H. Blackish-green serpentine, containing much chromite, North 

Blandford, Mass.

- I. Gray, splinteiy serpentine, Chester, Mass. Analyses F to I by 

George Steiger. Description by Emerson in Monograph XXIX.

J. Black, serpentized boltonite, Stow, Mass. Analysis by W. F. 

Hillebraiid.

SiOa . ...............................

Tin

A1A ......__............ ......_.._

OA .....-....-...............;...

FeA -----------------------------

FeO. ...............................

MnO.-.:-. . - ---.-..

NiO.... ............................

CoO.......... ....... ...:..... ...

CaO. ...............................

MgO. ..............................

NaA ----------------------------

K2O ................................

HjO at 100°...... ...................

H.2O above 100°....... .......... ....

P n

CO....... .................... ......

sos ........-....:...................

FeS,. ..............................

F.

40.42

none

1.86

.28

2.75

4.27

trace

.53

trace

.66

35. 95

\ .1.

.21

10.51

trace

' 1.44

trace

.43

99.47

G.

36.94

trace

.50

.33

6.04

1.94

trace

.40

none

none

38.35

none

none

.71

12.07

trace

1.85

.20

99.33

H.

39.14

none

. 1.18

.33

4.46

3.14

none

.47

trace

none

41.45

none

none

.34

9.48

.02

none

none

100. 01

I.

33.87

none

.77

.38

2.81

4.25

.04

| .33

none

38. 57

none

none

.38

7.00

trace

10.82

.20

99.42

J36.92

none

.10

none

- 1.19

.87

trace

.59

43. 99

i .05

72

14.70

trace

.90

100. 03
86 MINERAL ANALYSES BY TJ. S. GEOL. SUBVEY. [BULL. 220.

,K. From Moriah, N. Y. Analysis by Charles Catlett. Described 

by Merrill, Proc. U. S. Nat. Mus., vol. 12, p. 596.

L. From the aqueduct shaft, New York City. Analysis by Charles 

Catlett. See Merrill, loc. cit., p. 598.

M. From Montville, N. J., light yellowish-green.

1ST. From Montville, darker green. Analyses M, N, by Charles Catlett. See Merrill, Proc., TJ. S. Nat. Mus., vol. 11, p. 105.

0. From Montville, massive.

P. From Montville, chrysotile. Analyses O, P, by E. A. Schneider. 

Discussion by Clarke and Schneider in Bulletin 78.

SiO2 ....... ................

A12 03 .-.....--...-.--....-'..

Fe,03 -----------------------

FeO ........................

MnO. ----..--.. -------------

NiO_. .......................

CaO ........................

Me-O

H2 0 at 105°-.--. -----.----.-.

H2O above 105°.... ..........

CO,. ...--. - 

K.

39.96

1.07

3.53

3.85

trace

none

none

37.61

| 13.65

99.67

L.

39.92

.08

.50

none

.90

42.52

1.36

13.26

1.64

100.18

M.

42.38

.07

.97

.17

42.14

1 14. 12

99.85

N.

40.23

2.18

4.02

trace?

trace

39.46

| 14.24

100.13

0.

42.05

| .30

.10

.05

42.57

.96

13.70

99.73

P.

42.42

.63

.62

tindet.

none

OQ

trace

41.01

2.04

13.60

100. 55
SILICATES. 87

Q. From Easton, Pa. Resembles a veriniculite. Analysis by E. A. 

Schneider. See Clarke and Schneider, Bulletin 90.

R. Grayish-green serpentine from Corundum Hill, North Carolina.

S. Picrolite from Buck Creek, Clay County, 1ST. C. Analyses R and 

S by E. A. Schneider. See Clarke and Schneider, Bulletin 78.

T. From the river Poldnewaja, district of Syssert, Urals, Siberia. 

Analysis by E. A. Schneider. See Clarke and Schneider, Bulletin 113.

U. From Greenville, Plumas County, Cal. Analysis by W. H. 

Melville.. Described by Diller in Bulletin 150.

Si02 .. ................................

Al O

FeA- - - - 

FeO...... ............. ..............

MO...... .................... ......

CaO.... --.....__.......-..-.-._:--..

MgO. ...............................

Na.0... ............................

K.O.... ............................

11,0 at 105°.. ............... ........

H.O above 105° ......................

Chroraite ..........................

Q.

43.71

3.59

.90

38.58

.13

2 22

.46

10.79

100. 38

E.

41.90

.71

.91

tmdet.

.10

40.16

2.26

13.90

99.94

S.

42.94

1 5.05

1.88

.61

36.53

1.53

11.68

100. 22

T.

42. 55

1.25

1.56

1.52

40.05

21

12.26

' .37

99.77

U.

39.14

2.08

4 27

2.04

trace

39.84

} 12.70

.11

100. 18
MINERAL ANALYSES BY U. S. GEOL. SUKVEY. [BULL.!

V. Light-green marmolitic serpentine, New Idria, Cal.

W. Black serpentine, Sulphur Bank, California.

X. Light-green serpentine, Sulphur Bank.

Analyses V, W, X by W. H. Melville. Described by Becker in 

Monograph XIII. Other analyses by Melville of impure serpentines 

from near Mount Diablo, California, are given in Bulletin 168.

Y. From Three Brothers, Mount Stuart quadrangle, Washington. 

Analysis by W. F. Hillebrand.

Si02 ..... ....................................

Ti02 ...... ..................................

ALA .......................................

CrA :-----------------------------------

 FeA -------------------------------------

FeO... ...... ............. ..................

MnO.-... ...... ...._........................

NiO.. ...... ............ ....................

CaO-.. - -.-..-.......I.-.-. ..........

MgO .......................................

Alkalies. ...............................'....

H2O at 110° ..................................

H.jO above 110° .'............................

PA

FeSj ........................................

V.

41.54

2.48

1.37

.04

40.42

'

} 14. 18 

100. 03

W.

39.64

1.30

.29

7.76

.12

.33

37.13

| 13.81

100. 38

X.

41.86

.69

.24

4.15

.20

38.63

} 14.16

99.93

Y.

39.00

trace

1.75

.47

5.16

1.71

.15

.10

38.00

.10

1.31

12.43

.03

100.21

GENTHITE.

From Riddle, Douglas County, Oreg. Analyzed by F. W. Clarke, 

and described by Diller and Clarke in Bulletin 60.

SiO2 ........................................ J................ 44.73-

A1A----- ---- .--...-----.-------.------..-.-----. --.-. ..--^ 1.18

FeA------------------------------------------------..^-----J

MgO.............................................. ........... 10.56

NiO.-----..-------------...-.--..-...---.---..-.---.---.-.- 27.57

H2O at 110°................. ................................ 8.87

H,O above 110°..........................................:... 6.99

99.90
SILICATES. 89

TALC.

Apple-green, beautifully foliated. From Huntersville, Fairfax 

County, Va. Analysis by E. A. Schneider.

SiO,..--.---.......................... ..'.................... 62.27

A1A----- ................................................. .15

FeA-----"------- .--.-----.-----i------ .-...-..-.-..-..-- .95

FeO.-,-_. ................................................. .85

MgO-._ .-. .-.--...----'-.....-.....-.......__-...........--. 30.95

MnO ---...-..--.-...--..--..............................._. trace

H.,0atl050 ..-- ..................!...........I.............. .07

HA ignition..____.__..__._.______ __.___.__________._. _____ 4.84

. 100.08 

GLAUCONITE.

From Big Goose Canyon, 15 miles southwest of Sheridan, Big Horn 

Mountains, Wyoming. Analysis by George Steiger. Specific gravity, 

2.73.

Si02 -...-- .............................:............... ...... 49.23

A1A------ - .. . .: .................... 7.11

Fe.2 03 ------ - ----------------------------------------------- 20.89

FQO...................................^...................... 3.06

MnO ..^.............................. ....................... trace

CaO...-..-....---- .......................................... trace

MgO---.-----.---------....-.---.--------.---.--.-----.------ 3.44

^^..................:.................:...................... .11

KjO.........-...-.-.-..-. ....-1-..l............. .-.. 8.51

H.,0 at 100°...................._..................:......... 1.83

HaO above 100°............................................... 4.88

99.06
90 MINERAL ANALYSES BY U. S. GEOL. SUEVEY. [BULL. 220.

KAOLINITE. .

A. From Hockessen, Del. Analysis by George Steiger.

B. From Aiken, S. C. Analysis by F. W. Clarke.

C. From Talladega, Ala. Analysis by Charles Catlett.

D. From the Eureka vein, St. Peter's Dome, near Pikes Peak, 

Colorado. Analysis by W. F. Hillebrand. Described by Cross and 

Hillebrand in Bulletin 20.

E. From New Discovery mine, Leadville, Colo. Analysis by W. F. 

Hillebrand.

F. From National Belle mine, Ouray County, Colo. Analysis by 

W. F. Hillebrand. Specific gravity, 2.611 at 18.5°. Described in 

Bulletin 20.

Si02 ........................

A12 03 -----------------------

Fe,O,--------- -----------

CaO _........__._-.---.,. 

MgO . ....................

Na2O .......................

K2 0... ......................

H2O at 100°.. ----------------

H2O above 100° --------------

P n

Ti02 ......................

GO

F. .........................

CaFs . ........... ............

O equivalent to F -----------

A.

48.73

37.02

.79

.16

.11

.04

.41

.52

12.83

.03

.17

100. 81

B.

45.56

40.25

} 14. 10

99.91

C.

43.21

37.27

.11

.10

.40

.28

5.02

13.48

99.87

D.

46.06

39.63

} 13.77

.68

100. 14

E.

43.66

37.78

.22

.30

trace

} 17. 95

99.91

F,

46.35

39.59

.11

1 13.93

.15

100. 13 

.06

100. 07

HALLO YSITE.

A. From the Detroit copper mine, near Mono Lake, California. 

Analyzed by F. W. Clarke, and described in Bulletin 9. 

B. From theLogan mine, Rico, Colo. Analysis by W. F. Hillebrand.

SiO2 -.---.._...--_._---._.__-._.____-__._._-.:..._...

A12 03 .--.... -. .-I .----.......:................

Fe2O3 ----------------------------------------------------

H2OatlOO° ....................................... ......

H2O above 100° ..................... .._........

A.

42.91

38.13

} 18. 95

99.99

B.

38.65

33.27

.22

13.70

14.34

100. 18
SILICATES. 91

CIMOLITE.

Rose-red, earthy variety, from Norway, Me. Analysis by R. B. 

Riggs. Described by Clarke in Bulletin 42.

SiO,-...._-..____.....___....._._...__.___....._....._..:.__.. 66.86

 A1A-------------------------------- ....------.-..-...-..... 22.23

FeA-------------------------------------------------------- -47

FeO........... ............................................... .18

MnO ......................... ....'.......................... .07

CaO............. .-........------...----...------.-...._..._ .42

MgO ......-....___....._................... ................. .33

LiaO.......................................................... .29

Na2 0. ....................................................... .46

KjjO. --_..-.......-.-..._.----..-_---.-.--.-----._-_._..___. .18

H^).................................................t....... 8.26

F ........................................................... .06

99.81 

PYROPHYLLITE.

Compact, white. From Deep River, North Carolina. Analysis by 

George Steiger.

SiO,......................................................... 64.73

TiO2 ...... ....................... .......................... .73

A1A-----------------------.-- ---------------------- - 29.16

FeA----------- ------------------------------------------- -49

MgO --...-..-_.--------..----_--...-_._---_- ...:-_._...._ trace

Ignition ............I............................ .......... 5.35

100.46

BOLE.

From South Table Mountain, Golden, Colo. Described by Cross 

and Hillebrand in Bulletin 20. Analyses by W. F. Hillebrand. 

.A. Dark brown. 

B. Light brown.

A. B.

Si02 ...

A1ACaO. 

MgO

42.63

18.76

11.88

2.59

3.39

.35

.24

20.21

46.17

22.03

4.64

2.30

2.42

«2.06 

20.38

100.05 100.00

a By difference.
92 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL.220.

VIII. TITAISTATES AND TITANO-SILICATES.

ILMENITE.

From the peridotite dike of Elliott County, Ky. Described by 

Diller in Bulletin 38. Analysis by T. M. Chatard.

TiO2 ........................................................ 49.32

SiO2 ................. ...............................\....... .76

AlyOt ........................................ ............. 2.84

Cr2 03 .------------------------------------------------------ . ..74

Fe2 03 . ............................................... ^...... 9.13

FeO_.-..--..-.--.----_-,--_--_._-_._-_._-._-..__.._-..-.... 27.81

MnO............. ....;.._..._....._._........_.....:... .20

CaO.. ...................................................... .23

' MgO ..........--.--,.-.---.---.......-.-..-,...... .......... 8.68

Alkalies'.............. ....................................... .19

P2O5 ............... ...................................... trace

Ignitium -...-.-..-..:....-.................................. .20

100.10 

XANTHITANE.

From Green River, Henderson County, N. C. Alteration product 

of titanite. Analyzed by L. G-. Eakins, and described in Bulletin 60. 

Specific gravity, 2.941 at 24°. Material-dried at 100°.

TiOj........ I............................................... 61.54

SiOs .......................................... T ............. '1.76

A12 03 ------------------------------------------------------ 17.59

Fe203 ------------------------------------------------------- 4.46

CaO....-.--....-.---------.---...-..-.....;...--...-...-... .90

MgO.-'----.-------_--.------.----_--.-_..--..---_.-_-.-.-.- trace

PA-- - .-, - - -4.17

H2 0.......................... t ............................. 9.92 

100.34 

TITANITE.

Pale-yellow, semi-translucent. From the waterworks tunnel, Washington, D. C. Occurs embedded in prochlorite. Analysis by F. W. 

Clarke. Specific gravity, 3.452.

TiOa .L........:.............................................. 40.82

SiO2 ........................................-.__..__.._...._... 30.10

MnO .-...--...--...-.--.-.-.......-....-...-.......-.---...- trace

CaO.-.--......-.-.--....-.............."....-..............-. 28.08

MgO'l... .................................................... .40

Ignition ...................................................... .54

99.94

V
CLARK E.] TITANATES AND TITANO-SILICATES. 

TSCHEFFKINITE.

93

From Bedford County, Va. Analysed by L. C4. Eakins and described 

by him in Bulletin.90.

A. Lustrous portion. Specific gravity, 4.33 at 27°. 

B. Dull portion. Specific gravity, 4.38 at 22°.2.

TiO, ---------------------------------------------

Si02 ............................................. ....:...

Tn D

Zro2 _._--- _..... -...._-. .. .........._..............

ThOa -- ---'--------------.---- ------ ---. ---------.

(Y,Er)A--------------------

(La,Di),O:t ------ ----------------- ----..-.---------.---.-

CeA ......................................... ..........

A12O3 .....................'................................

Fe^O,'.. ...................................... ...........

FeO ................ ......................................

CaO .. ....__..---_.._ -_...__ __.__._._-..___...

MgO. ................................................... ..

NaA--- .................................................

HA .....................................................

A.

18.78

20 21

.08

.85

1.82

19.72

20.05

3.60

1.88

6.91

4.05

.55

.06

.94

99.50

B.

18.99

21.49'

.08

trace?

-.75

1.64

17.16

19.08

3.65

2.89

5.92

5.24 .48'

.04

2.06

99.47.

ASTROPHYLLITE.

From St. Peter's Dome, near Pikes Peak, Colorado. Analyzed by 

L. G. Eakins and described by him in.Bulletin 90.

TiOj.................--........'....................---...... 11.40

SiOa - - ---.--,.-----------------.-.----..-.....-.---....-.- 35.23

ZrO2 . - .-.. - .-.__-..-.______-..... .__..____. 1.21

Ta,O6 ...........-.... ............ ................... .34

Fe2O3 ..-... ..- .. --..--.. ... ...... ........ 3.73

A12O3 . -----.---.------.--.---..--.-. .... .................... trace

FeO...................................................... 29.02

MnO.................................................... 5.52

CaO.. 

MgO. 

K20_. 

Na2O. 

H,0_.

.22

.13

5.42

3.63

4.18

100.03
94 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL. 220.

IX. CQJjUMBO-TANTAJLATES.

SAMARSKITE.

Mineral near samarskite, from Devils Head Mountain, near Pikes 

Peak, Colorado. Analyzed by W. F. Hillebrand arid described in 

Bulletin 55.

A. Pitch-black variety, streak dirty brown. Specific gravity, 6.18 

'at 22°.

B. Black, streak salmon colored. Specific gravity, 6.12 at 25°.

C. Altered variety: Specific gravity, 5.45 at 16°.

TaA ..........................................

CbA ---------------------------------------

WO3 ...........................................

SnO2 ...................................... .-.- .

ZrO, ...........................................

U0a ,-- - -- . - -....-.,.

U09 ..-....^.. ..................................

ThOa ..... .......................................

Ce A ............................... 1 ............

(La, Di) A ............ ................'.........

Er.,0,

YA . .

FeA ..........................................

FeO. .............................. ............

MnO. .'.'................ ........I...............

ZnO ............................................

PbO .......................................'.....

CaO.. -

MgO. .......................... ................

KaO-- ..........................................

(Na,Li) 2O .....................................

HA ..............................................

F... ............................................

A.

27.03

27.77

2.25

.95

2.29

4.02

3.64

.54

1.80

10.71

6.41

8.77

.32

.78

.05

72

27

.17

24

1.58

(?)

100.31

B.

28.11

26.16

2.08

1.09

2.60

4.22

3.60

.49

2.12

10.70

5.96

8.72

.35

.75

.07

.80

.33

.13

.17

1.30

(?)

99.75

c.

19.34

27.56

5.51

.82

03.10

6.20

3.19

.41

1.44

9.82

5.64

8.90

&.39

} .77

1.07

1.61

.11.

| .36

3.94

(?)

100. 18

«WithTiO2. &Or0.74UO2.
CLARKK.] MINERAL ANALYSES BY U. S. QEOL. SUKVEY. 95

X. BOBATES.

COLBMANITE.

A. Transparent crystal, ordinary type, Death Valley, California.

B, C. Blade-like crystals, Death Valley.

D. Priceite, Curry County, Oreg.

D. Pandennite, Island of Panderma, Black Sea.

Analyses by J. E. Whitfield, with details in Bulletin 55.

A. B. c. D. E.

50.70 49.56 49.62 48.44

CaO. .-----------------.-.-----.--. 27.31 27.36 27.40 32.15

MgO... .-- - .- . _ .10 .25

HA-- ------------ ... .... ' 21.87 22.66 22.70 19.42 19.40

SiO,.. ------------------------------------- .44 .47

99.98 100.27 100.45 100.01 100.19 

ULEXITE.

From Rhodes' Marsh, Esmeralda County, Nev. Analysis by J. E. 

Whitfield, Avith description in Bulletin 55.

BA------ ---------------------------- .-----.-.------------- 43.20

CaO. _.. --. _ _ . . . ..... 14.52

Na,O _. . - .-. -.-. .- - . . .. 10.20 . K,O -..- - .--..-----------.-..------.....---.---- .44

H.,O...... ---........:.---.-............-. ..'.. ........ 29.46

SiO. ----------- ... ... - -----. --.- -- ... -..-... .04

S03 . ---------------------- .- -. - - ....... .28

Cl .--...- ..---.-- -- -. . . ..-...- . 2.38

100. 52 

O equivalent toCl ---------.................'........--..--.. .53

99. 99 

LTIDWIGITE.

From Morawitza, Banat, Hungary. Analysis by J. E. AVhitfield, 

with description in Bulletin 55.

BA------ ---------------------- .---------------.--....-----. 12.04

FeA------ ------------------------- ..---.--.---- --.. -------- 37.93

FeO-. . --.- --- . - --- 15.78

MgO - . - . -. -. . 30.57

MnO ......-.....-..- --.-.---... ---..----..... -......- .16

HO.. ............................................. -..---.. 3.62

100.10
96 MINERAL ANALYSES BY U. S. QEOL. SURVEY. [BULT..220.

WARWICKITE.

From Edenville, Orange County, 1ST. Y. Somewhat contaminated 

by spinel, from which the warwickite could not be entirely freed. 

Analysis by J. E. Whitfield. See Bulletin 64.

B2O3 -------------------------------------------------------- 18.96

TiO2 .____.______,.._.._.___._.._..-.._._._._......____.______ 18.68

Si02 ......................................................... 1.16

A12 03 --------------------------- ------------------------ 9.44

FeO.--...-.__--_._..--.-----.---._----__. .............. -. 14.23

CaO................ .....................................^ ' .38

MgO ____._______.._____._..___._._..__._._..___.._..___.__,__. 34.41

H2O -....__.___.-_..--___.____.__.___.._ ....'.........I...... 2.80

100.06 

XI. NITKATES,

SODA NITER.

From the Leucite .Hills, Wyoming. Analysis by L. G. Eakins. 

The N2O5 was not determined directly, but calculated to satisfy 

Na2 0+K20. . ' , Na2O ................ .........-_................................ 32.09

K,O..:................................'........................ 4.97

N2O5 ......................................................... 61.58

CaO-.....-..............:.-................-...............- .24

SO8 .............. ....................................'........ .33

Cl ---..------.-----...------------------_-------------------.- trace

HoO............ ......................... ................-.'. .68

QQ uv. SQOu

NITER.

A. From Utah, exact locality unknown. Analysis by T. M. Chatard. 

B. From the Leucite Hills, Wyoming. Analysis by L. G. Eakins, 

with the N205 calculated to satisfy the alkalies.

Insoluble matter ._ .................. .....-...-.--......

K2O.. .................................................. .-

Na2O. -.-...-. ............................................

NA- - - - '- - - - -

Si02 ... ......................... ..........................

A12OS - ------------------------------------------------ ----

CaO..-----.-.--....--..-... .-..--..---.-...-..-...-..--.-

MgO ... . ..'...

NaCl. ....................................................

Cl

en

H20. .....................................................

A.

12.12

38. 38

12

44.30

| .20

1.43

trace

.08

2.05

1.24

99.92

B.

44. 91

.07

51.49

1.09

.09

1.59

.82

99.86
OLAHKE.] MINEKAL ANALYSES BY U. S. GEOL. SUBVEY. 97

XII. PHOSPHATES.

XENOTIME.

From the gold washings at Brindletown, K C. Analyses by L. G. 

Eakins.

A. Green, specific gravity, 4.68 at 24.2°. 

B. Brown, specific gravity, 4.46 at 24.4°.

A.

SiO,............___._._._... .__...__....___.___........... 3.46 3.56

Zi'O,.. ................................................... 1.95 2.19

U0a ....................................................... 4.13 1.73

trace trace

-77 1.57

-65 2.79

-93 .77

56-81 55.43

CaO...........................;.............---.......--. .21 .19

P2 O5 ..................................................... . 30.31 29.78

F ......................................................... ' .06. .56

H2 O.....................!......'.......................... .57 1.49

99.85 100.06

f- Molecular weight, 260. 

v, 

/-( . APATITE.

Dark-green, massive apatite from the topaz locality at Stoneham, Me. 

/ Analysis by J. E. Whitfield. See Bulletin 27. Specific gravity, 3.27.

P2 05 ...........................-......----....--.-...---... 40. 36

CaO......-...---------------------.----------------------- 47.60

£. MgO ....................................................... 6.08

P FeO-.-.-----...---.------------.--------------------------- 1.44

HaO ......-....-.---.----------,.--------------------------- .11

Cl--_--.......--.---..--.---------.-------------------- .29

F . ............ .--...-... 6.84 \ _______

102.72 

ExcessO ......................... -------------------------- 2.94

99.78

Bull. 220 03-
98 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL. 220.

TKIPLITE.

From a tin mine near Rapid City, S. Dak. Probably identical with 

Headden's "griphite." Analysis by L. G. Eakins, with description in 

Bulletin 60.

PA-------------------------------------------------------- 39.68

Si02 _.-___-;-.------_----..--.------._.--..---..-.-.-..--.-- .43

A1A------------------------------------------------------- 8.74

FeA. 

FeO.. 

MnO .

..-..-..-----------.I-__.-_---..---_-.-_---.-..- 2.36

........'.......................................... 1.97

..---._--._ .................:................. 29.13

.CaO---------------------..-I-.--.------------------------- 6.72

MgO ---..--'----..---.--..--.-------.--..---------...--...---- trace

Li2O.------..-..-..-.----------.. -------.---..-----.---..----- .13

K2O -------------------- '..... ~.--..---1.-----------------..... trace

H2O .---.,-.------------.-.--.------.-----------.----..---.--- 3.67

CO, .-.-.--.---.---.----_-----...-----------------.----- ----

F .- -.---.--- ---.--..---.----.--,-.---------.-.-.-.--..

01----..-------.--..-.-.--------------..--..-----------

Excess O

100.94

1.05

99.89

TURQUOISE.

From Los Cerillos, 1ST. Mex. Described by Clarke and Diller in 

Bulletin 42. Analyses bjr F. W. Clarke.

A. Bright blue, faintly translucent in thin splinters.

B. Pale blue, with a slight greenish cast. Opaque and earthy in 

texture. Specific gravity, 2.805.

C. Dark green, opaque.

PA . . ' . . .

SiOz . ----.-----------.-------.------...-..--.--..

A1A -------.----------------.----.--.---..-.

FeA --- --- -- -- --...- -.---...-

CnO ...... ...... .. .......... ..

CaO.._. .............................

H^)... .........................................

A.

31.96

1.15

-. 39. 53

6.30

.13

19.80

98.87

-

B.

' 32.86

.16

36.88

2.40

7.51

'.38

19.60

99.79

C.

28.63

4.20

37.88

4.07

6.56

18.49

99.83
MINERAL ANALYSES BY U. S. GEOL. SUKVEY. 99

XIII. VA1STADATES.

DESCLOIZITE.

A. From the Mayflower mine, Bald Mountain mining district, Beaverheacl County, Mont. Yellow, friable, not crystallized.

B. From the Commercial mine, Georgetown, IsF. Mex. Brilliantly 

.crystallized.

C. Cnprodescloizite from the Lucky Cuss mine, Tombstone, Ariz. 

Specific gravity, 5.88 at 19°.

Analyses by W. F. Hillebrand, with description in Bulletin 64.

VA--------. ------- ............. ....:

AS.A ---------------------.----.------

P o

Si02 ............................................

C02 .. ............ .............................

PbO.. ....... ...................................

ZnO ...........................................

CnO ...._._...._......_._...._.._'_.......-.....

FeO. .......... ..................................

CaO .----..--..-......-...-. ..................

MgO. .... ------- ............ ................

K2O... ................... ......................

Na2 0 ...........................................

H2O..... ........ ...............................

C1- - . .-. .-- ...............

A.

20.80

.32

27

.18

55. 93

15. 94

1.15

.70

.10

.06

4.87

. 99. 82

B.

20 44

.94

.26

1.01

56..01

17.73

1.05

.07

.04

.03

2 45

.04

100. 07

C.

10 7Q

1.10

.19

.80

.82

57.00

4.19

11.21

1.01

.04

.10

2.50

.07

98.99
100 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL.220.

CARNOTITE.

From Montrose County, Colo. See memoir by Hillebrand and Rausome, Am. Jour. Sci., 4th ser., vol. 10, p. 120. 

A, B, C. From Copper Prince claim, Roc Creek. 

D, E. From Yellow Boy claim, La Sal Creek. 

Analyses by W. F. Hillebrand.

VA--------------------------------

AsA- ---------- .---..-------.-.---.

P r\

Si02'. -. .-, - -

TiO

C02 .-. .- . .- .-. .

CJO

UO, - . - .- .............

MoO 3 -.----.-..----.--.-.-..--.-.-..

CrO,-.--- -- -- . ..- ..

FeA--- --- ---- --

AI r>

Pbo. ----..--- ------... ---...:.--

CuO.- ----- --. - . 

CaO. ...............................

SrO .................. :......°......

BaO.-----.~--.- ------------'-

M>O

Li^)...,.. ...................... ....

Na,O... -...-..--...--.-...-..-.......

K2O. -.--..-....-...-.--.--...-.--...

H2O at 105° ........... ..............

H2O above 105° .....................

A.

18. 35

.25

.33

.10

.33

.12

52. 25

.23

trace

1.77

1.08

.25

.20

2.85

72

.20

none

.09

6.73

2.59

3.06

8.34

99.84

B.

18.49

trace

.80

.15

.03

' 56

54.89

.18

.21

.09

.13

.15

3.34

.02

.90

.22

trace

.14

6.52

2.43

2 11

7.10

98.46

C.

15.76

none

.40

. .13

(?)

none

.18

47.42

.18

72

.08

.18

-.22

2.57

(?)

.65

24

(?)

.07

6.57

1.85

2.79

19.00

99.01

D.

17.80

5.05

52.28

nndet.

3.36

1.85

- 3.21

trace

.07

5.32

4.52

3.87

97.50

E.

18.05

.05

.20

(?)

none

54.00

.05

40

29

.07

trace

1.86

2.83

.14

.13

5.46

3.16

2 21

 10.33

99.25
CLAHKE.] MINERAL ANALYSES BY U. 8. GEOL. SURVEY. 101

XI V. ARSE1STATES AND ANTIMONATB8.

OLIVENITE.

From the American Eagle mine, Tintic mining district, Utah. 

Described by. Hillebrand in Bulletin 20. Analysis by W. F. Hillebrand.

...................................................... 40.05

PA- -- ----- -- -06

CuO----.-..-.-. ---.- . ---- .'-.--.---.'---.---. 55.40

FeA--- ------- ---------------.--------.-------------------- .25

CaO..... ............... ...................................... .16

ZnO . .----.---__._----------....--------..-----.--.---....- . trace

HA--- --------------------------------------------------- 3.39

Quartz __._._<___.__..._...---...._---------.-_-.--.-.--.-._:.. .40

99.71 

ERINITE.

From the Mammoth mine, Tintic district, Utah. Described by Hillebrand and Washington in Bulletin 55. Analyses bj? W. F. Hillebrand.

A. B.

AsA .................. ............ .....^ ... ........... 33.53 31.91

PA----------------------------------------------------- -10 ..........

CuO ..................................................... 57.67 57.51

ZnO ..........................-....'........................ 1.06 .59

CaO -.._....--......-.-.-.-.------...--....-...-..- -_...- .32 .51

MgO --.--.-.---..-...-.-------.-...-..---.--......--..--- trace trace

FeA ---.--------.------ ----------------.--.---.------ .14 .20

HA-- -------------------------------------------------- 7.22 9.15

100. 04 99. 87 

CLINOCLASITE.

From the Mammoth mine, Tintic district, Utah. Described by 

Hillebrand and Washington in Bulletin 55. Analyses by W. F. 

Hillebrand. Specific gravity, 4.38 at 19°.

* A. B.

AsA -.-----------...-.-.--.---.-..--. ..--.--.-.--_. .--.. 29.59 29.60

PA ------------------. --------------- --.'.-.--..-.----... .05 «.05

SiO2 .... .................................................. .06 o.06

CuO -......- .-.-.-.__.---.-._....._............________. 62.34 62.54

ZnO -...-. ...-....................................._..... .06 .04

FeA .............................................. ..^... .12 .12

HA--- ...................................... :........... 7.73 7.72

99.95 100.13

"Assumed the same as in A.
102 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [Buu,.220.

CONICHALCITE.

From the American Eagle mine, Tintic district, Utah. Analysis 

by W. F. Hillebrand, with description in Bulletin.20..

AsA------------------------------------------------------- 39-94

PA--------------.----------------- ----------.--»- -14

C02 (by difference) .......................................... .97

CuO....................................................... 28.68

ZnO........................................................ 2.86

CaO......................................................... 19.79

MgO.. ...-.----..--.I-.:-.----..---.---..-------.---..--- .54

FeA- - 

Ag.... 

H2O~. 

Quartz

.36

.30

5.52

.90

100.00

T£ ROUTE.

From the Mammoth mine, Tintic district, Utah. Described by 

Hillebrand and Washington in Bulletin 55. Analyses by W-. F. 

Hillebrand. Specific gravity, 3.27 at 20°.5.

AsA ~ -~. r - .-- - - ~--~

PA ----------------- .-..I--------- ------------------

CuO .....................................................

ZnO _,...._ .. -...___......_.........____....-.._._.

CaO....---.--...--------...---. .-..-_-----..-_-----_-._--

MgO.. .......... ................ ..........................

H2 0 ............................. ........................

so8 ....,.~~. .............. ............:....... .:....

A.

28.78

trace

45.22

.04

6.84

.05

 17.26

(?)

98.19

B.

26 22

46.38

trace

6.69

.04

17.57

2.27

 99. 17

CHENEVIXITE.

From the American Eagle mine^Tintic district, Utah. Analyzed 

by W. F. Hillebrand and described in Bulletin 20.

AsA-------------------------------------------------------- 35.14

CuO .-...;............ ........................-.-............ 26.31

CaO----------.-.---...-,.---...-------..-----.--.....--.-----.. .44

MgO _-..___....-....__..... ... -.. -. ... ...__... -.16

FeA------------------------------------------------------- 27-37

ALA ------ -.- - -- - - -- -- ----- .66

H2O.......;................................................... 9.33

Quartz -......-.-.....-----.-----.--.. ...................... .40

99.81
OLABKE.] AKSENATES AND ANTIMUNATES. . 103

MIXITE.

From the Mammoth mine, Tintic district, Utah. Described by 

Hillebrand and Washington in Bulletin 55. Analysis by W. F. 

Hillebrand.

AsA---------------------------- ------.--------------------- 28.79

PA- - -- --- --- -- ------ -06

SiO.,-..----.------------'.----.---..- -----.-.----.----.---. .42

CuO...--....---..-.. --...-.......--.................----.- 43.89

ZnO.......................................................... 2.70

CaO... ---:------------...-...--..-.-...._-....._.-....,..-... .26

BiA - - --- -------------- -- ---------- 11.18

FeA-------- - ----------------------------------------- - 97

H,6_._............................ ........................... 11.04

99.31 

SCORODITE.

Aii incrustation on hot spring deposits, from Joseph's Coat Spring, 

Broad Creek, Yellowstone Park. Analyzed by J. E. Whitfield and 

described in Bulletin 55.

AsA---- ---------------------------------------------------- 46.48

FeA------------------ .---------------- .-.-.----.-.--.---.. 33.29

H2 0 ............. .--.--._.....-.....-.;..--_.,......-.- -...-... 15.50

SO

100.46 

BINDHEIMITE.

From a claim near the Bertrand mine, Secret Canyon, Nevada. 

Analyzed by W. F. Hillebrand and described in Bulletin 20. Specific 

gravity, 5.01 at 19°, after correction for admixed quartz and cerussite.

SbA--- -- ------- ...--...-.-..--...----.--.....----.....- 35.20

PbO.................... ................................... 49.50

ChiO........................i................................ ' .58

ZnO.-......---..--.--.-..-.-.-...-.....---.....-....-..-... .18

CaO....-...--..--..-....--.-.-....--..-...............-.... -.66

MgO ....................................................... .03

K2 0........................................................ .14

Na2O.................................................. ...;.. .21

FeA------------------------------------------------------- -09

Ag.......................................................... .29

C02 --------------------J.---..----........_.-................' 3.35

H2 0........................................................ 5.86

Quartz ...................................................... 4.59

100.68
104 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL.220.

XT. SULPHATES A!NTD TEIXTJRITES.

GYPSUM.

A. From Hillsboro, New Brunswick. Analysis by George/ Steiger.

B. From the Western Plaster Works, Alabaster, Mich. Analysis 

by George Steiger.

C. From east of Cascade, Black Hills, South Dakota. Analysis by 

George Steiger.

D. From Rico-Aspen mine, Rico district, Colorado. Analysis by 

W. F. Hillebrand.

E, F. From Nephi, Utah. Analyses by E. T. Alien. Some anhydrite must be present.

SO,,-----.......----..........

CO,. ........................

Cl ..-..-..-_ .......

SiO,. ........................

TiO, ....... ....1.............

ALA .......................

Fe,O, ------.----.--------

CaO_. ......... -..__'- ___-.

SrO. .................. ......

MgO. -.--.. -_.-............

Na,O. .......................

K20. ...... ..............1...

H2 0----.-.-...--. -___.

Insoluble ......-..-..-.,.....

Organic matter. -._...__-___.

A.

46.18

trace

} ,0

32.37

trace

} ' 10

20.94

.10

99.79

B.

46.18

.03

1

} .08

32.33

.05

} - U

20.96

.05

99.82

C.

45.45

.85

' .10

.12

32.44

.33

20.80

100. 09

D.

1.54

.51

trace

.03

.09

32.49

.10

.92

trace

19.67

100. 42

E.

48.14

.65

trace

35, 29

trace

15.88

99.96

F.

39.53

7.73

.04

}. «

38.46

24

.07

.19

19 an

45

99.54

BROCHANTITE.

From the United Verde mine, Jerome, Ariz. Analysis by W. F. 

Hillebrand.

SO8 -.- -- ---- . - . ------------ 16.75

CuO.-.--.-----..-.-- .---- --.' .. --------- 69.45

PbO......................................................... .04

Fe2O3 (from gangue)..--............-..-....-....---..-.--...- .28

CaO.-.--...----.. .. .-. ................................. trace

H^O.......................................................... 12.05

P205 ..--.------ ..------- --.. _-- - ...... ........... trace

CO,.......... .--- .... ......'..-. ....' .71

Insoluble .................................................... .70

99.98
CLATCKE.] SULPHATES AND TELLUBITES. 

ANTLERITE.

105

From the Antler mine, Yucca Station, Mohave County, Ariz. 

Described by Hillebrand as a new species in Bulletin 55. Specific 

gravity, 3.93 at 16°, corrected for gangue. Analyses by W. F. Hillebrand.

A, B. First lot received.

C. Later sample.

S03 .-..----...--- .........................

CuO ...........................................

ZnO --..---..-...-......... ....................

CaO_. ..........................................

MgO ...........................................

A1A, Fe,0H ------------------------------------

SiOa - ..........................................

H2O. ...........................................

A.

18. 78

62.48

.27

.06

.03

.14

.06

- 10.21

8.01

100. 04

B.

18.48

62.69

27

.05

.03

.12

imdet

10.18

8.02

99.84

G.

20.11

63.26

.04

.04

.15

.05

10.05

6.27

99.97

PISANITE.

From Bingham, Utah. Analysis by W. F. Hillebrand.

S08 ----.---.--.---.--.---------- .--------------- --------.-- 28.52

CuO._.......I.-......-.__._.._--*.. ..'.............'..-....... 12.60

FeO.................................... .................... 14.13

ZnO.----...--.-...--.......------..----.------. ........... .10

H,O........................................................ 44.92

100.27

PICEALLUMOGENE.

From near Las Vegas, N. Mex. Analysis by "W. F. Hillebrand.

S08 .:........................................................ 37.51

ALA--- ---------------- .................................... 9.71

MnO .---..-..-.---...--..........._.....-.............--... .06

MgO'.... ...........................'............ ........... 6.75

Na-jO....................................................... 2.09

K,O. ....................................................... .28

H2 0.............. .......... ...:....................... 43.75

100.15
106 MUSTEKAL ANALYSES BY U. S. GEOL. SUBVEY. [BULL. 220.

HALOTRICHITE.

From the headwaters of Gila River, Grant County, 1ST. Mex., about 

40 miles north of Silver City. Analyzed by F. W. Clarke, and 

described in Bulletin 9.

SO8 ..-..................-.......-..--....'...................-.. 37.19

A1A------------------------------------------------------ 7.27

FeO........................................................ 13.59

HA........... ..................... ......'................. 40.62

Insoluble .......................................... .......^.. .50

99.17

ALUNOGEN.

A. From headwaters of Gila River, Grant County, N. Mex., about 40 

miles north of Silver City. Analyzed by F.W. Clarke, and described 

in Bulletin 9. Color, pinkish.

B. From the calcite spring, Yellowstone Park. Fine, white, silky 

fibers. Analysis by J. E. Whitfield.

C. From the Grand Canyon, Yellowstone Park. Analysis by J. E. 

Whitfield.

SOS ..............................................

ALA -------- ----- ---------

FeA ------------------------------------------

CaO ....................... ----------..-..

MgO_......_ --.- ---. . - -__-...-.

K2O ....................................... ----- -

Na.2 0... ........................................

HA- - -... - ---- - -- - -

Si02 ---- -----..---------.---.-- -......-

Insoluble. ...........-..--....-.---_-. ...........

A.

34. 43

15.52

42.56.

7.62

100.13

B.

40.65

15.72

trace

1.53

41.81

.09

99.80

C.

38.22

16.80

trace

.18

.01

.63

43.64

1.38

100.86

COPIAPITE.

A. From the Redington mine, Knoxville, Cal. 

B. From Sulphur Bank, Lake County, Cal.

'Analyses by W. H. Melville. Description by Melville and Lindi»;ren in Bulletin 61.
CLAKKE.] SULPHATES AND TELLUEITES. 107

SO, ............................................. ..........

A1A ...'.... I.................. _...-.-.-...------.-...... .

FeA ---------------------------------------------------

FeO .._........---._____....--..----.-.------.-.-...-----

MnO.... ................... ..:._-.----...............

CaO. ...................................... .. .. .. 

MgO....... '.....-............-.-.-------------.----. ---.

H2 0............... ................. ... -. .... 

Residue ..........................'.............. ..-._-.--.

A.

39.97

26.54

.46

.21

3.06

30.43

100. 67

B.

38.82

.37

26.79

3.28

trace

.25

.16

29. 58

.75

100. 00

KNOXVILLITE.

From the Redington mine, Knoxville, Cal. Described as a new 

specie's by Melville and Lindgren in Bulletin 61. Analysis by W. H. 

Melville. 

SO3 . -......-.-......-..........-..-------..........---...... 35.91

CrA- ----------------------------------------------------- 7.41

A1A- -------------------------------- ---------..------------ 4.83

FeA------- ------------------------------------------------ 15.36

FeO.......--...------.........---..-.-.-...-.-...----.-..... 3.81

NiO.

MgO

......... ......-........'...................:...... .83

-.-.......----------......--.-----.--....-...-.-- 3.22

EjO at 100°... ...-.-....-....--.----.----....-..--.-.-------- 9.30

H,0 above 100° .............................................. 17.60

Residue ..... : .....-...-.----.........-.---...-.--.......... 1 . 73

100.00

KEDINGTONITE.

From the Redington mine, Knoxville, Cal. Desci'ibecl as a new 

species by Melville and Lindgren in Bulletin 61. Analysis by W. H. 

Melville. Specific gravity, 1.761.

SOg.'.. ---.-----.-----------------..------.--..----..-.-...-- . 35.35

O A -----------..--.------.--------.--------.-----.------.... 7.51

ALO,.------------------------------------------------------ 5.14

FeA 

FeO.

.................................................. .19

.......... .......-....,............................' 4.58

NiO .....:..........................................-........ 1.00

MnO .-.-----..-.-..-....-.--...-....-.........-...-........ trace

MgO ................,...:.................................. 1.85

' H.,0 at 100°.................................................. 27.09

H2O above 100° ............................................ 14.34

Residue .................................................... 3.46

100.51
108 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL. 220.

ALUNITE.

A. From Knickerbocker Hill, Ouster County, Colo. Analysis by 

L. G. Eakins.

B. From Tres Cerritos Buttes, southwest of Indian Gulch, Mariposa County, Cal. Analysis by William Valentine.

sos _ -. ...........................:.....'...............

Al O

PeA- -------------------------------------- .--------- ----

CaO......................................................

MgO _.............--.....--..............:..-.......

K2O ...........---.....-. ....... ...... ............ .

Na.,O ..................-.-............-........ ..,.

H^O. ......... ..:............ ............. ............ .

SiO............ ...........................................

TiO2 ....

P,,0,

A.

35.91

38.91

.35

4.03

4. 32

13.03

2.82

99.37

B.

38.50

38.05

.23

.55

4.48

2.78

11.92

2 64

.40

trace

99.55

JAROSITE.

A. From Black Iron mine, Eagle County, Colo. 

B. From Pigeon mine, Kico district, Colorado. 

Analyses by W. F. Hillebrand.

S03 - . . -. . . .. - ...... .--..-.

FeA ..._._ ... .. ....-...... _.._ ..._.__..

PbO .....................................................

Mgo ._....._. ... . .:.._ . .___-. ..__

CaO ....................................................

KA--- ------------------------------------------------

NaA ....................................................

HA--- ...1.. .............................................

AI r>

PA ....!.. ........................ -.----.--.. -.'-.._.

SJO,.-----.. --- ---------. .----. ---- 

A.

30.72

46.37

1.80

8.14

27

11.40

.51

72

99.93

B.

28.20

43.81

.06

7.44

.08

11.64

1.00

.33

7.35

99.91
OLAMKB.] SULPHATES AND TELLUEITES. 109

NATROJAROSITE.

From Soda Springs Valley, on road from Sodaville to Vulcan copper mine, Nevada. Described by Hillebrand and Penfield in Am. 

Jour. Sci., 4th-ser., vol. 14, p. 211. Analysis by W. F. Hillebrand. 

Specific gravity, 3.18 at 30.5°.

SOB--------"---------------..-----..---------------------..:-.-.- 30.96

FeA--------------------------.---------.----.----.----.-.-. 50.98

CaO............. .........'...... .......................... .04

K2O ....................................................... .35

Na.,0........................................................ 6.03

H2 0 at 105° _-----..-..--.-.-- -.._----.._---....'.-._...--._. .12

H,O above 105° .............................................. 11.03

S\O2 ......................................................... .23

AsA-------------------------------------------------------- -20

99.94 

PLUMBO JAROSITE.

From Cooks Peak, New Mexico. Described as a new species by 

Hillebrand and Penfield in Am. Jour. Sci., 4th ser., vol. 14, p. 211. 

Analysis by W. F. Hillebrand. Specific gravity, 3.668 at 30.5°.

S08 ......-..---.-.---.---.-.---.-.------.---------------. 27.06

FeA-------.------------------------------------------------- 42.37

A1A?----------------- ---------------.--------.----..-------- .10

PbO..-.--.----_-.-------------------------- ------. 19.84

CuO................-......-.................... ..._-.... .27

CaO....--.--....---------.----------..--...--...----.-------. .05

MgO ......................................................... .01 . K,0.-- ------- ------------------------------------------- .17

Na2 0_------------------------------------- ---------------- .21

H2O at 105°.....i............................................ .02

S.aO &})OvelQ50 ...................1.......................... 9.54

SiO,.......................................................... .51

100.15
110 MINERAL ANALYSES BY IT. S. GEOL. SURVEY. [BULL. 220.

EMMONSITE.

A hydrous ferric tellurite fronf near Tombstone, Ariz. Analyzed 

partially by W. F. Hillebrand, and described by him as a new species 

in Proc. Colorado Sci. Soc., vol. 2, pt. 1, p. 21. The data relative to 

the composition of emrnonsite are as follows:

Te(Se) --___...___._-.___..._____

ZnO ------- :.... ..........................

HO

I.

59.77

14.00

8.28

II.

59. 15

14.06

III.

 59.05

14.90

IV.

59. 14

14. 20

1.94

.56

XVI. MOLYBDATES, TUNG STATES, AKD TJRANATES.

POWELLITE.

From the Seven Devils mining district, Idaho. Analyzed by W. H. 

Melville, and described by him as a new mineral species in Bulletin 

90. Specific gravity, 4.526.

 MoO8 ......... .-.......''......I................... ............ 58.58

WO;! ........................................................ 10.28

CaO _...__. '..............;.............._...... .............. 25.55

MgO 

Fe A 

A12O3

.16

1 . 65

trace

CuO ...-.-..-......................_.......................... trace

SiO-j........ ..-....-........-......-....-......'.....'........... 3.25

S -_..----..._..--..__.___.___..._.___,_____....._____ ___:__... nndet.

99. 47

HUBNERITE.

From the Royal Albert vein, Uncorapahgre district, Ouray County, 

Colo. Analyzed by W. F. Hillebrand, and described by him in Bulletin 20. Specific gravity, 7.177 at 24°.

wos - _.--....-.-....--_-.-......;.---.....__........ .-

CbA(?)- - .-- " - - - - ..-

MnO ...................... T .. -...__._..__. __._____..._______ 23.40

FeO-----.---_....-._._.-.-....-...__....._.._.____'_.______._ .24

...................r ................................. .13

100.02
CLABKE.] MOLYBDATES, TUNG8TATES, AND URANATES. Ill

URANINITE.

Analyses by W. F. Hillebrand. Discussed in Bulletins 78 and 90. 

In the original publications the gaseous constituent of nraninite was 

supposed to be nitrogen, as indeed it was in part. The discovery of 

helium, however, has shed new light upon the subject, and the analyses have been corrected accordingly,

A, B, C, D, E. Crystallized nraninite from Hale's quarry, Glastonbury, Conn. Nitrogen was certainly present in these specimens. 

uo,_ ----...-..---.--.- ........

UO3 .... ............................

ThO

CeO,. ................... ............

ZrO.,?......i.. .....................

(LaDi) A --------------------------

(YEr)A- -- -. -

PbO ............_..................

CaO.. ------ ....'...... ........ ------

MgO-.-.... .......... .....:...-.....

H.,O---.-. -------..-_.-..-....-

He, etc ----..--...- : -------_---_.---.

FeA ..............................

MnO... .......................'. ....

SiOs - .......... ....1... ............

P O

F

Insoluble ............................

CbA ---------------.---------------

Specific gravity. -..------..--.-.....

A.

22.08

59.13

9.57

3.14

.08

.97

tindet.

1.21

1.06

.85

.96

99.05 

9.139

B.

23.35

58.01

} 9.78

} .46

3.24

unclet.

undet.

.33

1.74

96. 91 

9.051

C.

22.22

59.31

 10.31

3.07

Tindet.

Tindet.

Tindet.

.67

.25

42

96.25

D.

26.48

57.43

9.79

25

.13

.20

3.26

.08

trace

.61

nndet.

.40

trace

.16

.70

99.49

9.587

E.

23. 03

59.93

 11.10

3.08

.11

.43

.34

.29

.16

.02

.04

.89

99.42 

9.622
112 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [NULL. 220.

F, G, H. Brilliantly crystallized, from Branchville, Conn. 

I, J. Altered liraninite, from the Flat Rock mine, Mitchell County, 

KG. '

K. Massive, from near Blackhawk, Colo. 

L. From Marietta, S. C.

UO*. ..............

uos ...............

TiO

ZrO2 .... ...........

ThO2 . ............

Ce02 .. .............

(LaDi)A- ---------

(YEr)A --

PbO ...............

ZnO ...............

FeO .--...--..-...--

FeA .- ....'. .

MnO ................

CaO ................

MgO. ..............

Alkalies .-.-...-. .

H,0.... ............

He, etc.............

SiO2 ...............

PA .............

AsA -------------- it )

CuFeS2 .............

FeS, ................

Insoluble...... .....

Specific gravity

F.

13.27

72.25

| 7.20

4.35

.11

.10

.18

.68

undet.

.03

.04

98.21 

9.733

G.

21.54 '

64.72

.33

6.93

4.34

.28

.07

.22

.67

undet.

.13

.14

99.37 

9.560

H.

14.00

70.99

1 6. 52

4.35

.27

(?)

.30

} ..«

.68

.38

.20

1.40

99.24 

9.348

I.

50.83

39.31

2.78

.26

.50

.20

4.20

trace

.85 .

} .30

1.21

.05

.08

(?)

.10

100. 67 

8.086

J.

44.11

46.56

3.04

4.53

.23

1 05 I -°

tindet.

tindet.

" .13

.06

98.91 

9.492

K.

25. 26

58.51

7.59

.22

.70

.44

.32

.16

.84

trace?

1.96

.02

2.79

.22

.43

.12

.24

99.82 

8.068

L.

| 83.95

.20

1.65

.19

9 C\K

6.16

3.58

.41

trace

trace

.20

98. 39
CLAKKK.] MOLYBDATES, TITNGSTATES, AND UKANATES. 113

M. Nivenite from Llano County, Tex.

N. Somewhat altered uraninite from Villeneuve, Province of 

Quebec, Canada. 

0. Masshre uraninite from Johanngeorgenstadt, Saxony.

uo.

U02 . ......................... ........ ...........

ThOa _. .........................................

ZrOa ... .........................................

CeOa _. ........ . ....... ... ...

(La, Di) A- -----------------------------------

(Y,£jl)^- /v TTSA n -------------------------------------

CaO ...........................................

PbO ......-_.........-.._.........----.- - 

H2O............................... --....--.....

He, etc .--.-.-.-.... i --............-.--.----..--.

SiO,. ....... ....................................

FeA . -.- ........ ... ..--. .

A1A 1----------------- ------------------ ---.

MgO. .............................................

Na2 0. ........................... ................

BiAi- -----------------------------------------

CuO ...........................................

MnO..............................-.:.-.- ......

P n

AsA -..--...-....--...--.-..------.-.....-....

VA» MoO8 , WO,' '...... .........................

csn

Specific gravity. ..--..--.-......-.-...--........

M.

20.89

44.17

6.69

.34

.34

2.36

9.46

.32

10.08

1.48

.08

.46

.14

1.47

98.28 

8.29

N.

34.67

41.06

6.41

(?)

.40

1.11

2.57

.39

11.27

1.47

.10

.19

.10

.09

.13

99.96

0.

22. 33

59.30

none

1.00

6.39

3.17

trace

.50

.21

.20

.17

.31

.75

.17

.09

.06

2.34

.75

.19

97.93 

6.89

Bull. 220 03-
114 MINERAL ANALYSES BY U. S. GEOL. SURVEY. [BULL.220.

The following uraninites are all from Norway, and were analyzed 

for comparison with the American material.

P. Broggerite from Annerod, near Moss. Specific gravity, 8.893. 

Q. From Elvestad. Specific gravity, 9.145. 

R. From Elvestad. Specific gravity, 8.320. 

S. From Skraatorp. Specific gravity, 8.966. 

T. From Huggenaskilen. Specific gravity, 8.930. 

U. Cleveite from Arendal. Specific gravity, 7.500. 

V. From Arendal.

U08 .-... .

U02 .... ............

ZrO2? ..........

ThO,.,... ...........

CeO,. ..............

(La,Di)A-- ----

(Y,Er)A -

PbO ...............

CaO.... ............

MgO. ..............

Alkalies .... ..-.-._

H2 0. ---------------

He, etc..... ........

FeA ..............

MnO. ..............

Si02 . ...............

PA ---------------

Insoluble.... ....

p.

30.63

46.13

.06

6.00

.18

.27

1.11

9.04

.37

> traces

.74

.17

.25

.22

.02

4.42

99.61

Q.

25.36

' 50.74

.08

8.48

21

.26

1.10

10.06

.77

> traces

- .73

.18

.21

.06

.38

' .04

.45

99.11

R.

22.04

43.03

 8.43

8.58

.37

}. ,B

.74

.15

.30

.29

trace

15. 45

99. 51

S.

32.00

43.88

8.98

.17

.36

.97

9.46

.36

> traces

. 77

.15

.09

.53

(?)

1.54

99.26

T.

35.54

43.38

6.63

.20

.23

-^r.03

9.44

.41

\ "

.79

.15

.32

.49

trace

.42

99.16

U.

41.71

24.18

3.66

9.76

10.54

1.06

.10

.23

1.23

nndet.

.03

.90

. 1.10

94.50

V.

26.80

44 18

4.15

.67

9.05

10. 95

.61

.04

.15

undet.

.18

24

K(\

4- -1*0 f*c\

1.19

98.71
INDEX.

Pace.

Actinolite ...................... 37

JEgirite .......1................ 34

Aiken,.S.C--.-----------------. 90

Alabaster, Midi ......_.--...-.. 104

Albite.......................... 26

Allanite..-...-........--..-..-.. 51

Almandite.-.------.-.--------.- 45

Alpine County, Cal............... 75

Alunite......................... 108

Alunogen........-.--.....--.... 106

Amador County, Cal............ 75

Amelia Court-House, Va ........ 46

Amphibole .................. 37,40,41

Analcite...... ................... 68

Andradite.......---.--.--..--.. 46

Annerod, Norway .............. 114

Annite .......................... 77

Anorthite ..-....-......--..--.. 27

Anorthoclase.--.----.....-.-... 26

Anthracite Creek, Colo.......... 65

Antlerite ....^ .................. 105

Apatite......................... 97

Apophyllite .---.--...----....... 64

Arendal, Norway ................ 114

Ashland County, Wis ........... 28,32

Astrophyllite.................... 93

Auburn, Me ........... 60,62,71,73,74

Augite ......................... 33,34

Axinite ......................... 57

Bakersville, N. C ................ 28

Bald Mountain District, Mont... 98

Baltimore, Md................... 26,77

Barkevildte...-..-..-..--:-.-... 41

Bastniisite.....--.--.-.-........ 24

Bauxite .................._..... 21

Bear River, Cal............... . 75

Bear Valley, Cal................ 72

Bedford County, Va ............ 93

Bergen Hill, N. J ............ 36,57,68

Berufiord, Iceland................. 65

Beryl........................... 42

Big Goose Canyon, Wyo......... 89

Big Trees quadrangle, Cal....... 41

	Page. 

Bindheiniite.....-.-..-..-.....- 103

Bingham, Utah................. 105

Biotite ........'.............. 74,75,80

Birch Lake, Minn............... 47°

Bismuthinite ..........--...-.-. 11

Black Hawk, Colo .............. 112

Blandford, Mass................ 84

Bloods Station, Cal ............. 75

Bole............................ 91

Boltonite....-..-.--.--.-.....-- 85

Boulder County, Colo........... 33

Bourg d'Oisans, Dauphiny ...... 57

Bozeruan, Mont................. 34

Branchville, Conn .............. 112

Brindletown, N. C :............. 97

Brochantite. .....-..-.--.-.....*.. 104

Broggerite...--...--....-..-..-. 114

Broken Hill, Australia ........... 17

Bronzite.......----.--.-..--...- 30

Brucite.......................... 22

Buck Creek, N. C............... 87

Buffalo Peaks, Colo............. 31

Burgess, Canada. 1.............. 76

Butte, Mont.............. 11,13,41,75

Calainine......I--------....--.. 53

Calaveras County, Cal ........... 16,17

Calaverite..--------...........- 16

Calhao, Brazil .................. 59,62

Calico, Cal.:..---.---..-........ 12

Canaan Mountain, Conn......... 37

Cancrinite...----------........- 43

Cape Prince of Wales, Alaska... 38

Carnotite....................... 100

Carson Hill, Cal................ .17

Cascade,S.Dak .................. 104

Chabazite ....................... 67

Chalk Mountain, Colo ........... 25

Chenevixite .................... 102

Chester,Mass .............I..... 85

Cheyenne Mountain, Colo ....... 24

Chlorite ........................ 83

Chloritoid ...................... 79

Chromite....--........:........ 21

115
116 INDEX.

	Page.

Chrysolite...................... 47

Chrysotile....................... 86

Cimolite........................ 91

Cleveite ........................ 114

Clifton, Ariz.................... .46

Clinoclasite....-.......---...-.. 101

Clinochlore............ ..... .... 83

Clip, Ariz ...................... 52,58

Cockeysville, Md ._.............., 23

Colemanite...................... 95

Colfax,Cal..................... 63

Conichalcite...................... 102

^Cooks Peak, N. Mes ............ 109

Copiapite.. ..................... 106

Cornwall, England ............. 57

Corundum Hill,N. C. 21,30, 37,80,83,87

Cosalite ..--.-..--.......--.--.. 15

CoveUite ............ ........... 11

Crazy Mountains, Mont.......... 26

Cripple Creek, Colo .............. 16

Crugers Station, N. Y........... 78

Cryolite.................:...... 17

Cryophyllite.............. ..... 74

Culebra, Costa Rica ............ 35

Culsageeite........----.-....-.- 80

Cuprobismutite....-....---.-.-- 14

Cuprodescloizite................ 99

Curry County, Oreg ............ 95

Ouster County, Colo ............ 21

.Cyrtolite ..................!..... 56

Danburite.....-......--....-..- 57

Datolite ........-.-..-.---.....-.-' 57

Death Valley, Cal................ 95

Deep River,N.C-------......... 91

Dekalb,N. Y.................... 61

Descloizite......-.......---.-...- 99

Devils Head Mountain, Colo.. 54,56,94

Diallage ..............'....-...-. 32

Diana, N.Y... r ................. 36

Diaspore......--..---.-.----.-.. 21

Diomede Island, Alaska .........' 38

Diopside r ......... .............. 32

Dolomite ....................... 23

Dugway District, Utah.......... 19

Duniortierite ..-.,-.-.....- .--.- 58

Eagle County, Colo .............. 108

Easton, Pa.--.--. ............. 37,76,87

Edenville, N. Y........:....,.,. .96

Edwards, N.Y................... 76

Elseolite........................ 42

Elliott County, Ky........... 45,47,92

Elpasolite ---.----.------:..-... 18

Eltoro. Cal...................... 45

	Page. 

Elvestad, Norway................. 114

Embolite..._.____..._._..__,__. 17

Emmonsite..................... 110

Enargite ....................... .13

Enstatite....................... 30

Epidote _.-._..-...___ ____._.. 50

Erinite ........... J............. 101

Etchison, Md................... 63,72

Fassa, Tyrol..................... 51

Feldspar ...............25,26,27,28,29

Fibrolite ....................... 52

Florissant, Colo................. 52

FortEllis, Mont...-...-..--.... 34

Fort Wingate, N. Mex.......... 47

Franklin, N. C.................. 80

Franklin Furnace, N. J --------- 32

Freieslebenite ....'---...-...._... 15

Fxichsite......................... 72

Gadolinite.... ......-----..-... 54

Gahnite.............. .......... 20

Gainesville, Ga_ ............ ,..^ 78

Gallatin Range, Mont............ 20

Garnet.......................... 45,46

Gearksutite ...-..-.._.....:..-. 18

Genthite........................ 88

Georgetown, N. Mex...,........ 99

Glastonbury, Conn.............. Ill

Glauconite ..................... 89

Gold............................. 10

Golden, Colo..... 64,66,67,68,69,70,91

Goshen, Mass................... 45

Gouverneur, N. Y..........:.... 61

Grand Manan. New Brunswick.. 69 

Grant County. N. Mex......... 13,106

Granville, Mass........-..-..'..-. 84

Green Mountain, Colo -.....-..-. 65

Green River, N. C .............. 80,92

Green Valley, Cal................ 83

Greenville, Cal........:......... 87

Greylock Mountain, Mass....... 26

Griphite................ ........ 98

Grossularite ..................... 45

Guitermanite..--.---..-..-_-.-. 15 

Gunnison County, Col..... 13,14,15,65

Gypsum _........................ 104

Gyrolite ...........

Haddam, Conn...! 

Halite.............

Hallite ...........

Halloysite -...-.-. 

Halls Valley, Colo 

Halotrichite ......

Hamburg, N. J.. .

64

62

17

81

90

14

106

61

K-.
INDEX. 117

	Page. 

Happy Camp, CaL_.._.......... 48

Harlem, N. Y................... 58

Hebbville, Md.................. 30,32

Hebron, Me..................... 60,73

Hessite...---..--......-......-. 16

Heulandite _._____.__-;_...___-. 65

High wood Mountains, Mont..... 41,44

Hillsboro, New Brunswick...... 104

Hockessen, Del ................. 90

Home Post Office, Tenn ......... 42

Hoosac Tunnel, Mass............ 26

Hornblende..................... 40,41

HiVbnerite.-._-.---..----..--... 110

Huggenaskilen, Norway ........ 114

Huntersville, Va................ 89

Hydronephelite. ................. 70

Hypersthene.................... 31

Ice River, British Coltimbia ..... 44

Ilnienite........................ 92

Ilvaite....--------.-..-...-....- 53

Iredell County, N. C............. 78

Italian Mountain, Colo .......... 34,

45,48,50,66,69

Jackson County, Oreg........... 10

Jacksonville, Ala............_... 21

Jade ..................... 35,37,38,39

Jadeite......................... 35

Jalisco, Mexico .................. 16

Jarosite ........................ 108

Jeiferisite ...--.....-.,...-..... 80

Jeffersonite..................... 32

Jerome, Ariz.................... 104

Johanngeorgenstadt, Saxony .... 113

Joplin, Mo....................... 23

Jordaiismiihl, Silesia .". ........... 39

Josephine County, Oreg .......... 10

Josephinite -.-.......--...-,.... 10

Kaolinite ........................ 90

Kerrite.-.-..--..-.-............ 80

Kiowa County, Kans............ 47

Knickerbocker Hill, Colo........ 108

Knoxville, Cal............. 11,106,107

Knoxvilleite .................... 107

Kotschubeite ................... 83

Kowak River, Alaska ........... 39

Kyanite ........................ 52

Las Vegas. N. Mex .............. 105

Laumontite..................... 66

Lawsonite ---_-_-_._-...._---..- 53

Leadville,Colo...... ............. 25,90

Lenni, Pa....................... 81

Lennilite ....-.........-..-...-.' 81

Lepidolite ---...--.-'..-..-.-..-. 73

Page. 

Lepidomelane........-._-.___._. 77

Leuchtenbergite .....--...... .-.. 83

Leucite......................... 30

Leucite Hills, Wyo ........... 32,76,96

Levynite .--.-..--...--.-.-..... 67

Liberty,Md .................... 79

Liberty Grove,Md.............. 54

Liebenerite..................... 72

Litchfield, Me.... 25,26,42,43,44,70,77

Llano.County, Tex....... 46, 54,55,113

Lollingite -......--.-.......--.. 13

Los Cerillos, N. Mex ............ 98

Lotus. Cal.----.....-.---.--.--. 78

Lucasite..---...-........--...... 80

Ludwigite...................... 95

Mackintosh! te................... 55

Madison County, Mont.......... 20

Magnet Cove, Ark ......'..... 34,68,82

Magnetite ....................... ' 20

Marblehead, Mass......-..-..--- 26

Margarite .......-..._._-..-..- - 78

Marietta, S. C '.................. 112

Marion County, Ark ............. 23

Mariposa County, Cal.... 41,72,74,108

Mariposite........'.-.-.......... 72

Marmolite...................... 85

Melonite.-..--.................. 17

Mesolite-----..--..--........-.. 69

Metacinnabarite ................. 11

Miask, Urals .................... 71

Mica............ 71,73,73,74,75,76,77

Microcline, Mass.......-.....-.- 25,26

Middlefield, Mass ............... 84

Middletown, Pa................. 82

Mitchell County, N. C.......... 25,112

Mixite.......................... 103

Mizzonite --.---..-.-----.-.--.-. 48

Mokelumne River, Cal.......... 75

Mono Lake, Cal................. 90

Monroe, Conn .................. 61

Montgomery County, Md ..... . 20

Montrose County, Colo.......... 100

Montville, N. J ........... 32,40,76,86

Morawitza, Hungary...-......--- 95

Moriah, N. Y................... 32,86

Moss, Norway .................. 114

Mount Stuart quadrangle, Wash. 88 

Mount Thielsen, Oreg........... 31

Muscovite ...'..-...-.... . ...... 71,72

Nantic Gulf .......... .......... 63

Nathrop, Colo .................. 46

Natrojarosite................... 109

Natrolite ....................... 68
118

Page. 

Nephelite....................... 42

Nephi, Utah.-.......----.-...-.. 104

Nephrite ... J................ 37, 38,39

New Almaden, Cal.............. 11,64

Newburyport, Mass............. 84

Newldria, Gal................... 88

Newlin,Pa ..................... 82

New York City .................. 86

New Zealand ................... 37

Niter...-.......,._.......-...-. 96

Nivenite................... .... 113

North Blandford, Mass...........' 85

North Fowl Lake, Minn......--. 25

Norway, Me _.._-.---.._.--.---_ 73,91 

Nottingham,Pa......-.--..-..-. 81

Oaxaca,Mexico ............----. 35

Oligoclase...............-...'... 28

Olivenite ....................... 101

Olivine.......................... 47

Orford,N.H.................... 61

Orthoclase.......-...--.-.---.--. 25

Ouray County, Colo ............ 90,110

Owens Lake, Cal.--.--...-..---. 24 

Pachnolite...----...-.--.-..---. 18

Painterite ......-.-.--...-...--. 82

Palmer Center, Mass .-.......--. 29,40

Panderma, Island of .-.--.--.-. 95 

Pandermite...-....--..---...... 95

Paris, Me............;'........ 62,71,73

Parkdale, Colo.................. 28

Parrott City, Colo ............... 15

Parrsboro, N. S.............. 66,67,68

Paterson, N. J.....^.............. 51

Pectolite ........................ 36

Peru, Me j...................... 25

Petalite ...... .................. 25

Petzite......................... 16

Phippsburg, Me ..-......-.-.--.. 27,50

Phlogopite ..................... 76

Picrallumogene-..-..-....-...-.. 105

Picrolite......................... 87

Piedmontite...---.---...-...... ' 50

Pierrepont, N. Y.........-..-.., 40,61

Pigeon Point, Minn............. 26

Pikes Peak District, Colo........ 17,

18,19,21,24,77 

Pine Mountain, Md.............. 50

Pisanite -....,..._..--....,-..... 105

Placerville, Colo---..__..--..-._ 78 

Platte Mountain, Colo .......... 51

Pleonaste.....---...-.---...-... 20

Plumbojarosite........--...--.. 109

Point Barrow, Alaska........... 36,38

Poldnewaja River, Urals. 

Polydymite...............

Port Henry, N. Y. .......

Powellite.-........_--..-

Prehnite. .................

Priceite .................

Prochlorite ..............

Prosopite...----..---..-..

Protovermictilite --...-.. 

Psilomelane .............

Ptilolite .--_. .._.__.._.-- 

Pyrope ..................

Pyrophyllite.............

Page. 

87 

12 

77 

.... 110

51 

95 

84 

19 

82 

22 

65 

45 

91 

Pyroxene---.-..----..-----.- 32,33,34

Rabun County, Ga.............. 74

Rapid City, S. Dak.........-.... 98

Raymond, Me ------------------ 27

Red Hill, N.H.....-..--......-- 42

Redingtonite ......-..---......- 107

Red Mountain, Colo............. 14

Rhodes Marsh, Nev....-..-...-. 95

Rico, Colo--...-.....--...- 90,104,108

Riddle, Oreg........ _........... 47.88

Robenhausen, Switzerland...... 07

Rockport, Mass-.--.-........... 74,77-

Rocky Hill, N. J................ 82

Roscoelite ...................... 78

Rowe,Mass...--..-..----------- . 85

Rowlandite..................... 55

Rumford,Me................ 59,60,73

Running Water River, Wyo..... 72

Russell, Mass ................... 85

Russell,N.Y ................... 57

'Entile-----....-..--------..---.-- 21

Saas Valley, Switzerland ........ 49

St. Michael, Alaska.....--....-.- 38

St. Peters Dome, Colo. ---------- 17,18,

19,21,71,90,93 

Salton, Cal...................... 17

Samarskite..................... 94

San Emigdio, Cal ............... 30

San Juan County, Colo........... 14,15

Sardinal,Costa Rica ............. 35

Saussurite...................... 49

Scolecite......'......-.-....-...- 69

Scorodite ........................ 103

Secret Canyon, Nev ...........'.. 103

Serpentine............... 84,85, .86,87,88

Seven Devils District, Idaho .... 46,110

Shasta County, Cal ............. 49

Siderophyllite....... ...,. .-....-- 77

Sillimanite ...................... 52

Silver Cliff, Colo ............. 22,33,65 V-
INDEX. 119

.l>,

Silver City, Idaho..... 1......... 25

Silver Peak, Nev ................. 48

Silverton, Colo................... 15,44

Sinaloa, Mexico .................. 11

Skraatorp,Norway .............. 114

Slatoust,Urals.................. 79,83

Smithsonite .................... 23

Soda Springs Valley, Nev........ 109

Sodalite .......................... 44

Soda Niter....................... 96

South Mountain, Idaho.......... 53

Spessartite ----.--.--...--...--- 46

Spinel.........................: 20

Staurolite ..----..--.-...-..-... 54

Sterling, N.J ................... 53

Stevenson Station, Md........... 71

Stilbite.. .................... 66

Stoneham.Me ................ 52,72,97

Stony Point,N.C-...._...--_... 63,71

Stow,Mass _--_-_---.._-.------. 85

Stromeyerite -...........- ...-.. . 12

Sudbury, Canada ................ 12

Sulphur Bank, Colo ............ 88,106

Table Mountain, Cal............ 41

Table Mountain, Colo ........... 64,

66,67,68,69,70,91

Talc......-...-.........--.-.-.. 89

Talladega, Ala.................. .90

Tenmile District, Colo....--..-.. 28

Teocalli Mountain, Colo ......... 13

Texas, Pa........................ 22

Thomsonite......._-.....-...... 70

Tiburon Peninsula, Cal.......... 53

Tintic District, Utah ...... 101,102,103

Titanite ........-.........-.-.--. 92

Tokajer-Berg, Hungary ......... 31

Tombstone, Ariz................. 99,410

Tooele County, Utah ............. 19

Topaz _.._.---..--..--...-..__-- 52 

Tourmaline............ 59,60,61,62,63

Page. 

Tremolite ....._................ 37

Tres Cerritos Buttes, Cal........ 108

Triplite-..-..................... 98

Tscheffkinite ................... 93

Tuckahoe,N. Y................. 23

Turquoise ...................... 98

Two Buttes, Colo................. 33

Tyrolite ........................ 102

Tysonite........................ 19

Ulexite......................... 95

Uraninite ............ 111,112,113,114

Urao........................... 24

Uvalde quadrangle, Tex ........ 33

Valmont. Colo .................... 33

Vermiculite..........'.. 76,80,81,82,83

Vesuvianite..................... 48

Vesuvius -----.---_-----.--. ---. 30

Villeneuve, Canada............. 113

Waluewite ...................... 79

Warrenite ..--..--.....--.-...-. 14

Warwick, Mass................. 40

Warwickite ____..-...___....._-.. 96

Washington, D. C......... 40,49,84,92

Wassons Bluff, N. S..'?....... 66,67,68

Webster, .Mass.................. 23

Westchester, Pa ................ 80,83

Wilmington, Del ................ 27,28

Winslow, Me ..-.--.-.----..---. 42

Wollastonite..................... 36

Xanthitane...................... 92

Xanthophyllite ..-.---------...- 79

Xenotime......-.---.--.------.. 97

Yancey County, N. C .--.-...... 49

Yellowstone Park............. 103,106

Yosemite Valley, Cal............ 74

Yttrialite....................... 55

Yucca.Station, Ariz............. 105

Zinkenite. 

Zoisite ... 

Zunyite ..

14

49

44

o

PUBLICATIONS OF UNITED STATES GEOLOGICAL SURVEY,

[Bulletin No. 220.]

The serial publications of the "United States Geological Survey consist of (1 

Annual Reports, (2) Monographs, (3) Professional Papers, (4) Bulletins, (5, 

Mineral Resources, (6) Water-Supply and Irrigation Papers, (7) Topographic 

Atlas of the United States folios and separate sheets thereof, (8) Geologic Atlas 

of the United States folios thereof. The classes numbered 2, 7, and 8 are sold at 

cost of publication; the others are distributed free. A circular giving complete 

lists may be had on application.

The Bulletins, Professional Papers, and Water-Supply Papers treat of a variety 

of subjects, and the total number issued is large. They have therefore been classified into the following series: A, Economic geology; B, Descriptive geology; C, 

Systematic geology and paleontology; D, Petrography and mineralogy; E, Chemistry and physics; F, Geography; G, Miscellaneous; H, Forestry; I, Irrigation; 

J, AVater storage; K, Pumping water; L, Quality of water; M, General hydrographic investigations; N, Water power; 0, Underground waters; P, Hydrographic 

progress reports. This paper is the twenty-fifth in Series D and the thirty-ninth in 

Series E, the complete lists of which follow. (B=Bulletin, PP=Professional Paper.)

SERIES D, PETROGRAPHY AND MINERALOGY.

B 1. On hypersthenc-andesite and on triclinic' pyroxene in augitic rocks, by Whitman Cross, with a

geological sketch of Buffalo Peaks, Colorado, by S. P. Emmons. 1883. 42 pp., 2 pis. 

B S. On secondary enlargements of mineral fragments in certain rocks, by R. D. Irving and C. R. Van

Hise. 1884. 56 pp., C pis. (Out of stock.)

B 12. A crystallographic study of the thinolite of Lake Lahontan, by E. S. Dana. 1884. 34 pp., 3 pis. 

B 17. On the development of crystallization in the igneous rocks of Washoe, Nevada, with notes on

the geology of the district, by Arnold Hague and J. P. Iddings. 1885. 44 pp. (Out of stock.) 

B 20. Contribution's to the mineralogy of the Rocky Mountains, by Whitman Cross and W. F. Hillebrand. 1885. 114 pp., 1 pi. (Out of stock.) 

B 28. The gabbros and associated hornblende rocks occurring in the neighborhood of Baltimore,

Maryland, by G. H. Williams. 1886. 78 pp., 4 pis. (Out of stock.) 

B 38. Peridotite of Elliott County, Kentucky, by J. S. Diller. 3887. 31 pp., 1 pi. 

B 59. The gabbros and associated rocks in Delaware, by F.' D. Chester. 1890. 45 pp., 1 pi. 

B Gl. Contributions to the mineralogy of the Pacilic coast, by W. H. Melville and Waldemar Lindgren.

1890. 40 pp., 3 pis.

B 62. The greenstone-schist areas of the Menominee and Marquette regions of Michigan; a contribution to the subject of dynamic metamorphism in eruptive rocks, by G. H. Williams; with

introduction by R. D. Irving. 1890. 241 pp., 16 pis. (Out of stock.) 

B GO. On a group of volcanic rocks from the Tewan Mountains, New Mexico, and on the occurrence

of primary quartz in certain basalts, by J. P. Iddings. 1890. 34 pp. 

B 74. The minerals of North Carolina, by F. A. Genth. 1891. 119pp. (Out of stock.) 

B 79. A late volcanic eruption in northern California and its peculiar lava, by J. S. Diller. 1891. 33

pp., 17 pis. (Out of stock.) 

B 89. Some lava flows of the western slope of the Sierra Nevada, California, by F. L. Ransome. 1898.

74pp., 11 pis. 

B 107. The trap dikes of the Lake Champlain region, by J. F. Kemp and V. F. Masters. 1893. 62 pp.,

4 pis. (Out of stock.) 

B 109. The eruptive and sedimentary rocks on Pigeon Point, Minnesota, and their contact phenom-

. ena' by W. S. Bayley. 1893. 121 pp., 16 pis. 

B 126. A mincralogical lexicon of Franklin, Hampshire, and Hampden counties, Massachusetts, by

B. K. Emerson. 1895. 180 pp., 1 pi.

B 136. Volcanic rocks of South Mountain, Pennsylvania, by Florence Bascom. 1896. 124 pp., 28 pis. 

B 150. The educational series of rock specimens collected and distributed by the United States

Geological Survey, by J. S. Diller. 1898. 400 pp., 47 pis. 

B 157. The gneisses, gabbro-schists, and associated rocks of southwestern Minnesota, by C. W. Hal!.

1899. 360 pp., 27 pis. 

PP 3. Geology and petrography of Crater Lake National Park, by J. S. Diller and H. B. Patton. 1902.

167pp., 19 pis.

B 209. The geology of Ascutney Mountain, Venr^nt, by R. A. Daly. 1903. 122 pp., 7 pis. 

PP 14. Chemical analyses of igneous rocks published from 1884 to 1900, with a critical discussion of

the character and vise of analyses, by H. S. Washington. 1903. 495 pp. 

PP 18. Chemical composition of igneous rocks expressed by means of diagrams, with reference to

rock classification on a quantitative chemico-miueralogical basis, by J. P. Iddings. 1903.

98 pp., 8 pis. 

B 220. Mineral analyses from the laboratories of the United States Geological Survey, 1880 to 1903,

tabulated by F. W. Clarke, chief chemist. 1903. 119 pp.
II ADVEKTISEMEftT.

SERIES E, CHEMISTRY AND PHYSICS.

B 9. Report of work done in the Washington laboratory during the fiscal year 1883-84, by F. W. Clarke

and T. M. Chatard. 1884. 40 pp. (Out of stock.) 

B 14. Electrical and magnet c properties of the iron carburets, by Carl Barus and Vincent Strouhal.

1885. 238pp. (Out of stock.) 

B 27. Report of work done in the Division of Chemistry and Physics, mainly during the year 1884-85.

1886. 80 pp. ' . B 32. Lists and analyses of the mineral springs of the United States (a preliminary study), by Albert

- C. Peale. 1S86. 235 pp. (Out of stock.)

B 35. Physical properties of the iron arburets, by Carl Barus and Vincent Strouhal. 1886. 62 pp. 

B 36. Subsidence of fine solid particles in liquids, by Carl Barus. 1886. 58pp. (Out of stock.) 

B 42. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year

1885-86, by P. VV. Clarke. 1887. 152 pp., 1 pi. (Out of stock.) 

B47. Analyses of waters of the Yellowstone National Park, with an account of the methods of

analyses employed, by Frank Austin Goo hand James Edward Whitfield. 1888. 84pp. (Out

of stock.) 

B 52. Subaerial decay of rocks and origin of the red color of certain formations, by Israel Cook Russell.

1889. 65 pp., 5 pis. (Out of stock.) 

B 54. On the thermoelectric measurement of high temperatures, by Carl Barus. 1889. 313 pp., 11 pis.

(Out of stock.) . B 55. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year

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B 60. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year

1887-88. 1890. 174pp. (Out of stock.) 

B 64. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year

1888-89, by F. W. Clarke. 1890. 60 pp.

B 68. Earthquakes in California in 1889, by James Edward Keeler. 1890. 25pp. 

B 73. Tl'e viscosity of solids, by Carl Barn's. 1891. xii, 139 pp., 6 pis. B 78. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year

1889-90, by F. W. Clarke. 1891. ]31 pp. 

B 90. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year

1890-91, by F. W. Clarke. 1892. 77 pp.

B 92. The compressibility of liquids, by Carl Barus. 1892. 96 pp., 29 pis. 

B 94. The mechanism of solid viscosity, by Carl Barus. 1892. 138pp.

B 95. Earthquakes in California in 1890 and 1891, by Edward Singleton Holden. 1892. 31pp. 

B 96; The volume thermodynamics of liquids, by Carl Barus. 1892. 100pp. 

B 103. High temperature work in igneous fusion and ebullition, chiefly in relation to pressure, by

Carl Barus. 1893. 57 pp., 9 pis.

B 112. Earthquakes in California in 1892, by Charles D. Perrine. 1893. 57 pp. 

B 113. Report of work done in the Division of Chemistry and Physics during the fiscal years 1891-92

and 1892-93, by F. W. Clarke. 1893. 115 pp. . B 114. Earthquakes in California in 1893, by Charles D. Perrine. 1894. 23 pp. 

B 125. The constitution of the silicates, by F. W. Clarke. 1895. 100 pp. (Out of stock.) 

B 129. Earthquakes in California in 1894, by Charles D. Perrine. 1895. 25pp. 

B 147. Earthquakes in California in 1895, by Charles D. Perrine. ]896. 23pp. 

B 148. Analyses of rocks, with a chapter 'on analytical methods, laboratory of the United States

Geological Survey, 1880 to 1896, by F. W. Clarke and W. F. Hillebrand. 1897'. 306 pp. (Out

of stock.) '

B 155. Earthquakes in California in 1896 and 1897, by Charles D. Perrine. 1898. 47 pp. 

B 161. Earthquakes in California in 1898, by Charles D. Perrine. 1899. 31 pp., 1 pi. 

B 167. Contributions to chemistry and mineralogy from the laboratory of the United States Geological

Survey; Frank W. Clarke, chief chemist. 1900. 166 pp. 

B 168. Analyses of rocks, laboratory of the United States Geological Survey, 18SO to 1899, tabulated by

F. W. Clarke. 1900. 308pp. (Oufof stock.)

B 176. Some principles and methods of rock analysis, by W. F. Hillebrand. 1900. 114 pp. 

B 186. On pyrite and marcasite, by H. N. Stokes. 1900. 50 pp. 

B 207-. The action of ammonium chloride upon silicates, by F. W. Clarke and George Steiger. 1902.

57 pp. (Out of stock.) 

PP 14. Chemical analyses of igneous rocks published from 1884 to 1900, with a critical discussion of the

character and use of analyses, by H. S. Washington. 1903. 495 pp. 

PP 18. Chemical composition of igneous rocks expressed by means of diagrams, with reference to

rock classification on a quantitative chemico-mineralogical basis, by J. P. Iddings. 1903.

98 pp., 8 pis. 

B 220. Mineral analyses from the laboratories of the United States Geological Survey, 1880 to 1903,

tabulated by F. W. Clarke, chief chemist. 1903. 119 pp.

Correspondence should be addressed to 

THE DIRECTOR,

UNITED STATES GEOLOGICAL SURVEY,

WASHINGTON, D. C. 

NOVEMBER, 1903.
LIBEARY CATALOGUE SLIPS.

[Mount each slip upon a separate card, placing the subject at the top of the 

second slip. The name of the series should not be repeated on the series 

card, but the additional numbers should be added, as received, to the first 

entry.]

Clarke, F[rank] W [igglesworth].

. . . Mineral analyses from the- laboratories . of the 

United States Geological survey, 1880 to 1903, tabulated by F. W. Clarke, chief chemist. Washington, 

Gov't print, off., 1903.

119, III p. 23£cm. (U. S. Geological survey. Bulletin no. 220.) 

Subject series D, Petrography and mineralogy, 25; E, Chemistry and 

physics, 39.

Clarke, F[rank] W [igglesworth].

( ... Mineral analyses from the laboratories of the 

» | United States Geological survey, 1880 to 1903, tabu- 

\ f lated by F. W. Clarke, chief chemist. Washington, 

Gov't print, off., 1903.

119, III p. 23£cm . (U. S. Geological survey. Bulletin no. 220.) 

Subject series D, Petrography and mineralogy, 25; E, Chemistry and 

physics, 39.

U. S. Geological survey.

Bulletins.

I no. 220. Clarke, F. W. Mineral analyses from the 

laboratories of the U. S. Geological survey, 

1880-1903. 1903.

U. S. Dept. of the Interior.

see also 

U. S. Geological survey.