NBS MONOGRAPH 25 —SECTION 1

Standard X-ray Diffraction

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
THE NATIONAL BUREAU OF STANDARDS

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Office, Washington, D.C.
UNITED STATES DEPARTMENT OF COMMERCE • Luther H. Hodges, Secretary

NATIONAL BUREAU OF STANDARDS • A. V. As tin, Director

Standard X-ray Diffraction

Powder Patterns

Howard E. Swanson, M. C. Morris,

Roger P. Stinchfield, and Eloise H. Evans

National Bureau of Standards Monograph 25 — Section 1

Issued March 9, 1962

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington 25, D.C. - Price 40 cents

Contents

Page

Introduction

Conversion factors for comparison of peak

height and integrated intensities

Standard X-ray powder patterns:

Aluminum Fluosilicate, topaz, Al2 Si04 (F,OH) 2 (orthorhombic)

Ammonium Chloroosmate, (NH4) 2 0sCl6 (cubic).

*Bismuth Fluoride, BiF3 (orthorhombic)

Cerium(III) Chloride, CeCl3 (hexagonal)

*Cerium(III) Vanadate, CeV04 (tetragonal)

Cesium Perchlorate, CsC104 (orthorhombic)

Cesium Vanadium Sulfate Dodecahydrate,

CsV(S04 ) 2 -12H2 0 (cubic)

*Erbium Gallium Oxide 3:5, Er3 Ga2 (Ga04 ) 3 (cubic)

*Europium(III) Chloride, EuCl3 (hexagonal) _ _ Europium Oxychloride, EuOCl (tetragonal)

Gadolinium Fluoride, GdF3 (orthorhombic)

*Gadolinium Oxide, Gd2 03 (cubic)

*Gadolinium Oxychloride, GdOCl (tetragonal) _ _ *Holmium Ethylsulfate Nonahydrate,

Ho[(C2 H5)S04 ] 3 -9H2 0 (hexagonal)

Iron Arsenide, FeAs (orthorhombic)

Lanthanum Borate, LaB03 (orthorhombic)

*Lanthanum Chloride, LaCl3 (hexagonal)

Lanthanum Magnesium Nitrate 24-Hydrate,

La2 Mg3 (N03) 12 -24H2 0 (trigonal)

Lithium Molybdate, Li2 Mo04 (trigonal)

*Lithium Oxide, Li2 0 (cubic)

Lithium Tungstate, Li2 W04 (trigonal)

*Lutetium Oxide, Lu2 03 (cubic)

Magnesium Aluminum Silicate (low-cordierite)

,

Mg2 Al4 Si5 0i8 (orthorhombic)

4

6

7

8

9

10

11

12

13

13

14

16

17

18

19

20

21

22

23

25

25

27

28

Magnesium Aluminum Silicate (high-cordierite),

Mg2 Al4 Si5 0i 8 ] (hexagonal)

Magnesium Silicate Fluoride (humite), 3Mg2 Si04

- MgF2 (orthorhombic)

*Neodymium Borate, NdB03 (orthorhombic)

Neodymium Chloride, NdCl3 (hexagonal)

Neodymium Gallium Oxide 3:5, Nd3 Ga2 (Ga04 ) 3 (cubic)

Nickel Arsenic Sulfide (gersdorffite), NiAsS

(cubic)

Nickel (II) Carbonate, NiC03 (trigonal)

Nickel Sulfide, millerite, NiS (trigonal)

Potassium Dihydrogen Arsenate, KH2 As04 (tetragonal)

Praseodymium Chloride, PrCl3 (hexagonal)

Samarium Chloride, SmCl3 (hexagonal)

Samarium Fluoride, SmF3 (hexagonal)

Samarium Gallium Oxide 3:5, Sm3 Ga2 (Ga04) 3 (cubic)

Samarium Oxychloride, SmOCl (tetragonal)

Silver Carbonate, Ag2 C03 (monoclinic)

Silver Oxide, Ag2 0 (cubic)

Sodium Molybdate, Na2 Mo04 (cubic)

Sodium Tungstate, Na2 W04 (cubic)

Thallium (I) Tungstate, T12 W04 (hexagonal) _ _ Ytterbium Gallium Oxide 3:5, Yb3 Ga2 (Ga04) 3 (cubic)

Yttrium Gallium Oxide 3:5, Y3 Ga2 (Ga04 ) 3 (cubic)

Yttrium Oxychloride, YOC1 (tetragonal)

Zirconium Iodate, Zr(I03 ) 4 (tetragonal)

Cumulative index to Circular 539, Volumes 1, 2,

3, 4, 5, 6, 7, 8, 9, and 10, and Monograph 25,

Section 1

*Not previously represented in the Powder Date File. Errata (Circular 539)

Vol. 9. Page 56, hkl 357 should be 537.

Vol. 10. Page 7. hkl 231 should be 232. Page 52, space group P2,/n should be P2i/c.

Page

29

30

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

Standard. X-ray Diffraction Powder Patterns

The ten previous volumes in this series are available from the Superintendent of Documents, U.S. Government

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STANDARD X-RAY DIFFRACTION POWDER PATTERNS

Section 1—Data for 46 Substances

Howard E. Swanson, Marlene Cook Morris,1 Roger Stinchfield,1 and Eloise H. Evans 1

Forty-six standard X-ray diffraction powder patterns are presented. Fourteen are to replace twelve patterns already given in the X-ray Powder Data File, and thirty-four are

for substances not previously included. The X-ray Powder Data File is a compilation of

diffraction patterns from many sources and is used for the identification of unknown crystalline materials by matching spacing and intensity measurements. The patterns were made

with a Geiger counter X-ray diffractometer, using samples of high purity. The d-values were assigned Miller indices determined by comparison with calculated interplanar spacings

and from space group considerations. The densities and lattice constants were calculated,

and the refractive indices were measured whenever possible.

Included are X-ray data for the following forty-six substances: (NH4) 2 0sCl6 , Al2 Si04 (F,OH) 2 , topaz, BiF3 , CeCl3 , CeV04 , CsCl04 , CsV(S04 ) 2 -12H 2 0, Er3 Ga2 (Ga04 ) 3 , EuCl3 , EuOCl, GdF3 , GdOCl, Gd2 03 , Ho[C2 H5 )S04 ] 3 -9H 2 0, FeAs, LaB03 , LaCl3 , La2 Mg3 (N03) 12 -24H 2 0, Li 2 Mo04 , Li2 0, Li2 W04 , Lu2 03 , Mg2 Al4 Si5 0i8 (k>w-cordierite)

,

Mg2 Al4 Si5 0i8 (high-cordierite), 3Mg2 Si04 -MgF2 (humite), NdB03 , NdCl3 , Nd3 Ga2 (Ga04 ) 3 , NiAsS (gersdorffite), NiC03 , NiS, millerite, KH2 As04 , PrCl3 , SmCl3 , SmF3 , Sm3 Ga2 (Ga04 ) 3 , SmOCl, Ag2 C03 , Ag2 0, Na2 Mo04 , Na2 W04 , T12 W04 , Yb3 Ga2 (Ga04) 3 , Y3 Ga2 (Ga04 ) 3 , YOC1,

Zr(I03) 4 .

INTRODUCTION

The National Bureau of Standards in its program 2 for the revision and evaluation of published

X-ray data for the X-ray Powder Data File

presents data in this report for 46 compounds.

This paper is the eleventh of a series of "Standard

X-ray Diffraction Patterns." The designation

"Circular 539" used in previous issues has been

discontinued in favor of a new series, "Monograph

25." Included are patterns recommended to re- place data on 12 cards now in the file. The

patterns for 34 compounds not represented in the

file have been added. These compounds are: ammonium chloroosmate, bismuth fluoride, cerium(III) vanadate, cesium perchlorate, cesium

vanadium sulfate dodecahydrate, erbium gallium

oxide 3:5, europium (III) chloride, europium oxychloride, gadolinium oxychloride, gadolinium

oxide, holmium ethylsulfate nonahydrate, iron

arsenide, lanthanum borate lanthanum (III)

chloride, lanthanum magnesium nitrate 24-

hydrate, lithium molybdate, lithium oxide,

lithium tungstate, lutetium oxide, magnesium

aluminum silicate (orthorhombic) , neodymium

borate, neodymium gallium oxide 3:5, nickel

arsenic sulfide (gersdorffite), nickel (II) carbonate,

potassium dihydrogen arsenate, praseodymium(III) chloride, samarium(III) chloride, samarium oxychloride, sodium molybdate, thallium (I)

tungstate, ytterbium gallium oxide 3:5, yttrium

gallium oxide 3:5, yttrium oxychloride, zirconium

iodate.

1 Research Associate at the National Bureau of Standards sponsored by

the Joint Committee on Chemical Analysis by Powder Diffraction Methods

2 This project is sponsored by the Joint Committee on Chemical Analysis

by Powder Diffraction Methods. This committee is composed of members

from the American Society for Testing Materials, the American Crystallo- graphic Association, and the British Institute of Physics. Financial support

is also provided by the National Bureau of Standards.

The experimental procedure and general plan of

these reports have not changed from that of previous volumes of the NBS Circular.3 However,

the basic technique is discussed, in this section,

under the same headings that appear in the text

of this volume.

ASTM cards. Each section of this Monograph

contains a table listing the ASTM file card numbers, the three strongest lines, the radiations used,

and the literature references for each card. Cards

listed in the 1960 index to the Powder Data

File [1]

i are included in the table.

Additional published patterns. Literature ref- erences for patterns that have not been published

as ASTM cards are listed.

NBS sample. Many of the samples used to

make NBS patterns were special preparations (of

exceptionall high purity) obtained or prepared

only in small quantities. Unless otherwise noted,

the spectrographic analyses were done at NBS

after recrystallization or heat treatment of the

sample. The limit of detection for the alkali

elements was 0.05 percent for the spectrographic

analysis. A phase-purity check was made on the

nonopaque materials during the refractive index

determination. Another check of phase-purity

was provided by the X-ray pattern itself, since it

was indexed by comparison with theoretical dvalues. Treating the sample by appropriate

annealing, recrystallization, or heating in hydrothermal bombs improved the quality of most of

the patterns.

3 Other volumes were published as follows: Vol. 1 and Vol. 2, June 1953; Vol. 3, June 1954; Vol. 4, March 1955; Vol. 5, October 1955; Vol. 6, September

1956; Vol. 7, September 1957; Vol. 8, April 1959; Vol. 9, February 1960; and

Vol. 10, September 1960.

* Figures in brackets indicate the literature references at the end of each

section of this paper.

1
At least two patterns for intensity measurements

were prepared to check reproducibility. Samples

that gave satisfactory intensity patterns usually

had an average particle-size well within the recommended range of 5 to 10 n, as suggested by Alexander, Klug, and Kummer [2]. A special cell with one open end was used for making intensity

measurements. The sample was prepared by

clamping a flat piece of glass temporarily over the

surface of this holder, and while it was held in a

vertical position, the sample was drifted in from

the open end. The glass was then carefully re- moved so that the surface of the sample could be

exposed to the X-ray beam. Powders that did

not flow readily or were prone to orient excessively,

approximately 50-volume percent of finely ground

silica-gel was added as a diluent. The intensity

of the diffraction lines were measured as peak

heights above background and were expressed in

percentages of the intensity of the strongest line.

Additional patterns were obtained for c?-value

measurements. These specimens were prepared

by packing into a sh allow holder a sample containing approximately 5-wt percent tungsten

powder that served as an internal standard. The

lattice constant used for tungsten at 25 °C is 3.1648 A, as determined by Jette and Foote [3]. All of the NBS patterns, unless otherwise noted,

are made at 25 °C, using either filtered copper

radiation (Ka{) or cobalt radiation (Kc^), having

the wavelengths 1.5405 A, and 1.7889 A, respectively.

Structural data. Although the lattice constants obtained at NBS of cubic materials were

calculated for each (/-value, the constants reported is that obtained by averaging the last five lines

because of the greater accuracy of measurement

in the large-angle region of the pattern. The

unit-cell values for each noncubic substance were

determined by means of a least-squares calculation made on the IBM 704, using those ^-values

for which only one hkl could be assigned. The

number of significant figures reported for rf-values

in the NBS pattern is limited by the quality of

each sample and by its structural symmetry.

Conversion Factors for Comparison of

Occasionally someone wishes to compare integrated intensity values with the peak height to

background measurements made at the NBS for

the Powder Data File. Conversion factors, applicable when copper radiation is used, can be read

from the chart in figure 1 as a function of 26.

Factors from the right side of the chart, multiplied

by peak height values, give the corresponding

integrated intensities. Factors for converting

peak-height intensities to integrated intensities are on the left side of the chart.

The ordinate values used in determining the curve in figure 1 are the ratios of the integrated

intensity to the peak height intensity for each line

in medium to sharp patterns obtained from

Published unit-cell data were converted to

angstrom units as internationally defined in 1946

[4] using the factor 1.00202. When cell values

based upon more than one cell configuration have

been taken from the literature, corrections that

were made to make them comparable have been

indicated. The limits of error generally published

with unit-cell data have not been included in the

table because the number of determinations and

their accuracy and variations were such that a

statistical evaluation would be unjustified.

The space groups are listed with both the

Schoenflies and short Hermann-Manguin symbols as well as with the space group numbers

given in the International Tables for X-ray

Crystallography.

Orthorhombic cell dimensions are presented

according to the Dana Convention [5] 6>o>c

rather than with a permutation as is occasionally

given in the literature.

The densities calculated from the NBS lattice

constants are expressed in grams per cubic centimeter and are based upon atomic weights reported

by E. Wichers [6] in 1956 and the Avogadro number (6.0240X1023) reported by Straumanis [7] in

1954. The refractive index measurements were made by grain-immersion methods in white light

using oils standardized in sodium light.

References

[1] Index to the X-ray Powder Data File, American

Society for Testing Materials, Philadelphia, Pa.

(1959).

[2] L. Alexander, H. P. Klug, and E. Kummer, Statistical

factors affecting the intensity of X-rays diffracted

by crystalline powders, J. Appl. Phys. 19, No. 8, 742-753 (1948).

[3] E. R. Jette and F. Foote, Precision determination of

lattice constants, J. Chem. Phys. 3, 605-616 (1935).

[4] Anonymous, The conversion factor for kX units to angstrom units, J. Sci. Inst. 24, 27 (1947).

[5] Dana's System of Mineralogy, 1, 6 (1944).

[6] E. Wichers, Report of the Committee on Atomic

Weights of the American Chemical Society, J. Am.

Chem. Soc. 78, 3235 (1956).

[7] M. E. Straumanis, Remarks concerning the absolute

value of Avogadro's number, Phys, Rev. 95, 566

(1954).

3ak Height and Integrated Intensities

(NH4 ) 2PtCl6 , W, and Ca3Al2 (Ge04) 3

. A curve based upon diffuse peaks or another radiation

would be expected to vary from this one. The patterns used for these measurements were

scanned slowly (4 in. equal to one degree) to produce a broad peak. The area of the peak was

recorded with a planimeter (G. Coradi, Zurich,

Switzerland). Later, additional integrated intensity data were obtained by cutting out the peaks

and weighing them. Since both integrating

methods seemed to give equal precision, and a

large number of points were needed to obtain the

curve, all data from the three patterns were

included.

2
00

crO

h-o

<

X

UJX

<

UJ

CL

Q

Ul

<

cr

00

oro

io

<

O

UJ<

cro

UJ

hX

<

UJ

0-

50 160

2 9

Figure 1. Conversion factors for comparison of peak height and integrated intensities for copper radiation with medium to sharp peaks.
Aluminum Fluosilicate, topaz, Al2Si04 (F,OH)2 (orthorhombic)

ASTM cards

Card

numbers

Index

lines

"Ra fiia tiion Rontop

* 2-0704

2-0705

2. 96

1. 40

1. 38

Copper British Museum

» From Scotland.

Additional published patterns. None.

NBS samples. Samples of topaz from three

different sources were used. Spectrograph^ analysis of each sample showed the following impurities:

(Minas Gerais, Brazil) 0.01 to 0.1 percent of

germanium; 0.001 to 0.01 percent each of gallium,

iron, sodium, titanium, and zinc; and 0.0001 to

0.001 percent each of boron, calcium, copper, lead,

magnesium, and tin. (Durango, Mexico) 0.01 to

0.1 percent of iron; 0.001 to 0.01 percent each of

boron, gallium, germanium, sodium, titanium,

and zinc; and 0.0001 to 0.001 percent each of

calcium, lead, magnesium, manganese, and tin.

(Thomas Mountain, Utah) 0.01 to 0.1 percent of

iron; 0.001 to 0.01 percent each of gallium, germanium, sodium, titanium, and zinc; and 0.0001

to 0.001 percent each of boron, calcium, lead,

magnesium, ard tin.

The samples from Brazil and Utah were colorless. The sample from Mexico was slightly discolored brown. Topaz is optically positive with

2V^55° and the following indices of refraction

for each sample:

Source

Brazil 1. 613 1. 615 1. 622

Mexico 1. 608 1. 611 1. 618

Utah 1. 608 1. 611 1. 618

Average 1. 610 1. 612 1. 619

The average ^-values of the three strongest lines are: 2.937, 3.195, and 3.693 A.

Structural data. Leonhardt [1] in 1924 determined that topaz has the space group D^- Pmnb

(No. 62) and 4[Al2 Si04 (F,OH)2 ] per unit cell.

Lattice constants

a b c

A A A

1924 Leonhardt [1] 8. 39 8. 80 4. 65

1928 AlstonandWest[2]_ 8. 39 8. 80 4. 65

1961 National Bureau

of Standards:

Brazil 8. 392 8. 797 4. 649

Mexico 8. 395 8. 789 4. 649

Utah 8. 394 8. 791 4. 648

NBS average 8. 394 8. 792 4. 649

at 26 °C

According to Pardee, Glass, and Stevens [3] the beta refractive index varies with the amount of

fluorine present. The average value of the NBS

beta refractive index indicates an approximate

formula Al2 Si04F1 .9(OH)o.i, corresponding to 19.6

percent fluorine. This formula, together with the

average values of the NBS lattice constants, gives

an average density of 3.558 g/cm3 at 26 °C.

References

[1] J. Leonhardt, Rontgenographische Untersuchungen

am Topas, Z. Krist. 59, 216-229 (1924).

[2] N. A. Alston and J. West, The structure of topaz

[A12 (F, OH)2 Si04 ], Z. Krist. 69, 149-167 (1928).

[3] J. T. Pardee, Jewell J. Glass, and R. E. Stevens,

Massive low-fluorine topaz from the Brewer Mine,

South Carolina, Am. Mineralogist 22, 1058-1064

(1937).

4
Aluminum Fluosilicate, topaz, Al2 Si04 (F, 0H) 2 (orthorhombic) —Continued

1961 X1 Qfil U\J X IQfil X WX 1XuMX Qfil National Bureau National Bureau (\. q< l "fi 1 1W11.IL mn q 1 Riirpnii 1 f 1 1 1 ' , 1 1 1 "M rtn q 1 Hurpiiii of Standards of Standards of Standards of Standards

Cu, 1.5405 A Cu, 1.5405 A rin 1

c>4ft ci A Cu, 1.5405 A

hkl at 26 °C at 26 °C at 26 °C at 26 °C

Minas Gerais, Durango, Mexico Thomas Moun- Average

Brazil tain, Utah

d / d I d d

A A A A

020 4. 396 4 4. 396 5 4. 394 5 4. 395 5 200 4. 191 4 4. 193 6 4. 199 3 4. 194 4

01

1

4. 109 12 4. Ill 9 4. 114 11 4. Ill 11 120 3. 894 6 3. 895 6 3. 898 7 3. 896 6

1 1

1

XXX 3. 690 54 3. 697 62 3. 693 65 3. 693 60

021 3. 194 58 3. 196 72 3. 195 69 3. 195 66

220 3. 035 32 3. 036 43 3. 037 37 3. 037 37

121 2. 986 21 2. 988 24 2. 985 25 2. 986 23

211 2. 934 100 2. 938 100 2. 939 100 2. 937 100

031 2. 4806 20 2. 4806 22 2. 4800 23 2. 4804 22

301 2. 3962 10 2. 3968 10 2. 3969 11 2. 3966 10

131 2. 3785 22 2. 3779 30 2. 3785 27 2. 3783 26

320 2. 3605 44 2. 3605 34 2. 3617 58 2. 3609 45

002 2. 3241 6 2. 3247 12 2. 3253 5 2. 3247 8

311 2. 3126 7 2. 3126 9 2. 3138 11 2. 3130 9

012 2. 2472 5 2. 2467 6 2. 2472 6 2. 2470 6

040 2. 1994 11 2. 1989 10 2. 1984 10 2. 1989 10

1lid1 9 2. 1706 14 2. 1716 11 2. 1711 12 2. 1711 12

1 4.0 2. 1266 5 2. 1266 13 2. 1276 7 2. 1269 8

391 2! 1049 38 2. 1058 46 2. 1040 47 2. 1049 44

022 2. 0553 21 2 0553 21 2. 0558 30 2. 0555 24

041 1. 9881 5 1. 9872 8 1. 9864 8 1. 9872 7 919 Aid 1. 9823 6 1. 9815 16 1. 9811 4 1. 9816 9

94.ft 1. 9477 2 1. 9481 5 1. 9453 4 1. 9470 4

141 1 rt X 1. 9344 4 1. 9340 5 1. 9336 6 1. 9340 5

411 1. 8688 25 1. 8700 21 1. 8685 25 1. 8691 24

331 1. 8553 19 1. 8553 32 1. 8553 25 1. 8553 26

ft*}9 1. 8219 9 1. 8209 12 1. 8209 15 1. 8212 12

941 1. 7967 9 1. 7957 7 1. 7954 7 1. 7969 8

1X0639 1. 7797 4 1. 7791 5 1. 7800 6 1. 7796 5

232 1. 6709 31 1. 6706 26 1. 6703 24 1. 6706 27

322 1. 6559 11 1. 6559 6 1. 6565 8 1. 6561 8

Oil 341 1. 6205 13 1. 6205 7 1. 6198 13 1. 6203 11 431 1. 6016 1. 6021 5 1. 6006 1 1. 6014 2

ft49 L 5975 2 1. 5968 5 1. 5978 2 1. 5974 3

501 1. 5788 2 1. 5790 1 1. 5795 1 1. 5791 1 142, 520 1. 5690 1 1. 5683 5 1. 5678 2 1. 5684 3

4ft 9 1. 5570 1 1. 5575 <1 1. 5575 <1 1. 5573 <1

OIL ^1 1 1. 5534 — 1. 5546 4 1. 5551 <1 1. 5544 1 uuo ftft3 L 5496 <i 1. 5499 6 1. 5477 6 1. 5491 4

412 1. 5333 13 1. 5340 14 1. 5331 10 1. 5335 12

013, 332 1. 5264 16 1. 5267 11 1. 5262 20 1. 5264 16

440 1 Kt Q1 A

1. 5181 10 1. 01 / y

A. 1. 5180 6

11 1lo3 1. 5018 <1 1. 4994 <1 1. 5007 <1 1. 5006 <1

949 1. 4929 1 1. 4925 2 1. 4925 2

521 1. 4858 2 1. 4862 6 1. 4860 2 1. 4860 3

060 1. 4648 3 1. 4642 9 1. 4650 4 1. 4647 5

ft93 1. 4615 6 1. 4609 11 1. 4617 10 1. 4614 9

1 fift 441 1. 4439 9 1. 4431 6 1. 4429 8 1. 4433 8

123 1. 4401 5 1. 4395 3 1. 4397 4 1. 4398 4

213 1. 4341 3 1. 4351 5 1. 4341 3 1. 4344 4

351 1. 4186 24 1. 4175 24 1. 4179 29 1. 4180 26

052 1. 4028 18 1. 4026 32 1. 4015 24 1. 4023 25

618033—62 2 5
Ammonium Chloroosmate, (NH4) 2OsCl6 (cubic)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of ammonium chloroosmate was prepared at NBS by R. B. Johannesen from chloroosmic acid and ammonium

chloride. Spectrograph^ analysis showed the

following impurities: 0.001 to 0.01 percent each

of aluminum, beryllium, magnesium, and silicon.

The color of the sample was deep red. The

indices of refraction could not be determined

because the sample was too fine-grained.

The d-values of the three strongest lines are: 5.71, 4.94, and 2.978 A.

Structural data. The structure of ammonium

chloroosmate has not been published but, because

of the similarity of patterns, it is thought to be

isostructural with ammonium chloroplatinate.

The NBS pattern was indexed assuming the space

group Ol Fm3m (No. 225) and 4(NH4 ) 20sCl6 per

unit cell.

Lattice constants

A

1961 National Bureau of Standards. _ 9. 881 at 25 °C

The density of ammonium chloroosmate calculated from the NBS lattice constant is 3.022

g/cm3 at 25 °C.

1961

hkl National Bureau of Standards

Cu, 1.5405 A at 25 °C

b / (X

A

111 ^ 71 1X 00uu 0 80

200 4 04 0V. 88oo

oon 3. 491 26 0 874

311 2. 978 45 Q 877

222 6.9 8^1 oOl A 9. 876

400 9 4fi0 ou Q 87fi 331 9 9fi7 1xufi 0 881

a on 4Z0 2. 209 29 Qy. 870 oi y 422 2. 016 10 0 87fi 511 X1 Q17 9. 883

440 1 74-7 10 0 889

531 X . u / u 17X 1 0 880

600 ]. 647 13 0 889

620 1. 562 4 017. 870 Ota

533 1 ^07 ftu 9. 882

444 1 49fi ft\j 017. OOU 880

711 1 38^ 8o 0 880

640 1. 3701 5 0i/. 880 OOU

642 1. 3204 4 Qi7. 881 OO X 731 1X. 98fi4 ^OU^fc r\j 9. 881

800 1 9^40 o 0«7. 870 O 1 \J 733 1 9079 o 0»7. 881 OO X

]. 1983 6 0i7. 881 OO X 822 1. 1645 2 QU. 881 OO X 751 1 1411 A 9. 882

840 J.. 1 1XU^0471 4 0»7. 881 OOX

911 1X. 084^ XJO^O 4 017. 880 OOU

O A O 84Z 1. 0780 4 0£7. 880 OOU

664 1. 0531 1 0 870

931 1x. 0^7 vjoot QO 9. 880

844 i. uuoo 4r 0y. oi870y 933 Ou. 0090 yy^<7 4 0t7. 87Q O 1 <J i A ri A 10-0-0 . 9878 1 017. 878 O 4 O

10-2-0 . 9687 2 0 870

951 Q^O 9 9. 879

953 Q91 9 1X 0t7. 870 O / iJ 10-4-0 . 9173 2 0if. 880 OOU

10-4-2 . 9019 1 Q*7. SSO OOV7 11-1-1 '. 8908 <1 9. 879

880 . 8733 <1 9. 880

11-3-1 . 8632 2 9. 880

10-4-4 . 8600 1 9. 881

10-60 . 8473 1 9. 881

11-3-3 . 8381 <1 9. 881

12-0-0 . 8234 2 9. 881

11-5-1 . 8149 <1 9. 880

12-20 . 8121 <1 9. 880

12-2-2 . 8015 <1 9. 882

11-5-3 . 7936 1 9. 880

Average value of last five lines . 9. 881
Bismuth Fluoride, BiF3 (orthorhombic)

ASTM cards. None. Data on card number

2-1235 is for bismuth oxygen fluoride, Bi2 OF4) instead of bismuth fluoride, BiF3

. Additional published patterns. None.

NBS sample. The sample of bismuth fluoride

was prepared by Olen Kraus of NBS by reacting

bismuth oxide with a large excess of hydrofluoric

acid at 80 °C. Spectrographic analysis showed

the following impurities: 0.01 to 0.1 percent of

sodium, and 0.001 to 0.01 percent each of aluminum, barium, calcium, iron, magnesium, and

silicon.

The sample was colorless. The indices of re- fraction were not determined because the sample

was too fine-grained.

The rf-values of the three strongest lines are: 3.406, 2.970, and 3.508 A.

Structural data. Zachariasen and Plettinger

[1] in 1950 determined that bismuth fluoride has

yttrium fluoride-type structure, the space group

DJg-Pnma (No. 62), and 4(BiF3 ) per unit cell.

Lattice constants

a b c

A A A

1955 Aurivillius and

Lundqvist [2] 6. 56 7. 04 4. 83

1949 Zachariasen and

Plettinger [1]__- 6. 56 7. 03 4. 86

1961 National Bureau

of Standards 6. 563 7. 021 4.845 at 25 °C

The density of bismuth fluoride calculated

from the NBS lattice constants is 7.912 g/cm3 at

25 °C.

References

[1] W. H. Zachariasen and H. Anne Plettinger, Mass Spectroscopy and Crystal Structure Division Quarterly

Report, Argonne National Laboratory Report 4400,

12-16 (September 1, 1949-November 30, 1949).

Quoted in Zalkin and Templeton [3]. [2] B. Aurivillius and T. Lundqvist, X-ray studies on the

system BiF3 — Bi2 03. I. Preliminary phase analysis

and a note on the structure of BiF3 , Acta Chem.

Scand. 9, 1206-1208 (1955).

[3] A. Zalkin and D. H. Templeton, The crystal structures

of YF3 and related compounds, J. Am. Chem. Soc.

75, 2453-2458 (1953).

hkl

011

101

020

111

200

210

121

211

002

102

112

221

131 301, 022

202

311

230, 122

212

040

321

222

400

132

141

410

312

013

113

331, 411

232

420

241, 322

203

123

042, 421

142

402

051

430

223

332, 412

033

151

341

242, 133

303

431

250

313

501, 422

251, 511

233

323

004

440

1961

National Bureau of

Standards

Cu, 1.5405 A at 25 °C

A

3. 985

3. 897

3. 508

3. 406

3. 278

2. 970

2. 607

2. 533

2. 420

2. 272

2. 161

2. 148

2. 006

1. 993

1. 949

1 918

1. 905

1. 877

1. 755

1. 734

1. 704

1. 640

1. 630

1. 600

1. 597

1. 582

1. 574

1. 530

1. 517

1. 497

1. 486 %

1. 474

1. 4489

1. 4318

1. 4215

1. 3890

1. 3587

1. 3483

1. 3436

1. 3399

1. 3341

1. 3293

1. 3214

1. 3180

1. 3028

1. 2995

1. 2955

1. 2913

1. 2777

1. 2670

1. 2471

I. 2326

1. 2187

1. 2112

1. 1987

7
Cerium(III) Chloride, CeCl3 (hexagonal)

ASTM cards

Card

number

Index

lines Radiation Source

9-68 2. 56

2. 11

3. 56

Copper Zachariasen [1] 1955

Additional published patterns

Source Radiation

Kojiina, Inoue, and Ishiyama [2] Copper

NBS sample. The sample of cerium chloride

was received as a hydrate from Lindsay Chemical

Co., West Chicago, 111. It was dried in a hydrogen

chloride atmosphere at 30 mm total pressure and

450 °C for one and one-half hours. It was then

transferred in a dry box to a dry atmosphere sample holder used to prepare the patterns. An analysis from Lindsay Chemical Co. showed the following impurities: less than 0.1 percent combined of

lanthanum, praseodymium, and neodymium.

The sample was colorless. The indices of refraction could not be determined because the sample

was too hygroscopic.

The d-values of the three strongest lines are: 2.586, 6.47, and 3.590A.

Structural data. Zachariasen [3] in 1948 determined that cerium chloride has the uranium chloride-type structure, the space group C6h-P63 /m

(No. 176) and 2(Ce'Cl3 ) per unit cell.

Lattice constants

1948

1951

1961

Zachariasen [3]. Kojima, Inoue, and Ishi- yama [2]. National Bureau of Standards.

a c

A

7. 451

7. 451

7. 454

A

4. 313

4. 313

4. 312 at 25 °C.

The density of cerium chloride calculated from

the NBS lattice constants is 3.944 g/cm3 at 25 °C.

hkl

1961 National Bureau of Standards Cu, 1.5405 A

at 25 °C

al I

A

100 6. 47 84

110 3. 729 48

101 3. 590 78

200 3. 229 19

111 2. 824 51

201 2. 586 100

210 2. 438 16

002, 300 2. 153 47

211 2. 125 71 102 2. 048 16

112, 220 1. 864 19

202 1. 792 11 311 l! 654 12

212 1. 615 13

302 1. 523 17

320 1. 482 17

410 1. 408 23

321 1. 401 23

312 1. 3776 6

203 1. 3126 9

402 1. 2923 6 500 1. 2912 <1

213 1. 2382 11 412 1. 1790 9

511 1. 1192 8

323 1. 0313 11

References

[1] W. Zachariasen, The crystal structure of trichlorides,

tribromides and trihydroxides of uranium and of rare earth elements, U.S. Atomic Energv Comm. TID

5213, 157-164 (1955).

[2] T. Kojima, T. Inoue, and T. Ishiyama, Crystal struc- ture of cerium compounds II, studies on cerium

compounds by X-Ray analysis of crystal structure (Report 2), J. Electrochem. Soc. Japan 19, 383-386

(1951).

[3] W. Zachariasen, Crystal chemical studies of the 5-f series of elements, Acta Cryst. 1, 265-268 (1948).

8
Cerium(III) Vanadate, CeV04 (tetragonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of cerium (III) vanadate was prepared at NBS by reacting stoichiometric solutions of cerium (III) chloride heptabydrate and ammonium metavanadate. It was

then heated at 750 °C for 15 min to improve the

crystallinity. The cerium (III) chloride heptahydrate was obtained from the Lindsay Chemical

Co., West Chicago, 111. Their analysis showed a

total maximum impurity of rare earth oxides of

0.1 percent, largely lanthanum, praseodymium,

and neodymium. Spectrograph^ analysis at NBS

showed the following additional impurities for

CeV04 : 0.01 to 0.1 percent of silicon, and 0.001 to

0.01 percent each of aluminum, calcium, iron,

magnesium, and nickel.

The color of the sample was an opaque yellow

brown.

The ^-values of the three strongest lines are: 3.70, 2.761, and 1.898 A.

Structural data. Milligan and Vernon [1] in 1952

determined that cerium (III) vanadate has zircontype structure, and the space group D^-14/amd

(No. 141) with 4(CeV04 ) per unit cell.

Lattice constants

a c

1952

1961

Milligan and Vernon [1] National Bureau of Standards.

A

7. 34

7. 399

A

6.47

6.496 at 25 °C

The density of cerium (III) vanadate calculated

from the NBS lattice constants is 4.763 g/cm3 at

25 °C.

Reference

[1] W. O. Millegan and L. W. Vernon, Crystal structure

of heavy metal orthovanadates, J. Phys. Chem. 56,

145-148 (1952).

hkl

1961 National Bureau

of Standards Cu, 1.5405

A at 25 °C

d

A

101 4. 89 30

200 3. 70 100

211 2. 948 9

112 2. 761 67

220 2. 615 19

202 2. 441 5

301 2. 306 16

103 2. 078 10

321 1. 955 9

312 1. 899 50

400 1. 849 16

213 1. 811 4

411 1. 729 2

420 1. 653 10

303 1. 627 4

004 1. 624 4

402 1. 606 2

332 1. 5361 12

204 1. 4875 10

501 1. 4429 4

224 1. 3799 10

512 1. 3248 10

440 1. 3079 3

600 1. 2332 4

503 404 1. 2208 6

215 1. 2096 2 611 ±. ±yoo o 532 1. 1819 8

620 1. 1697 3

523 424 1. 1595 9

325 1. 0979 1 631 1. 0875 1 116, 613 1. 0603 6

415 1. 0524 1 701 1. 0432 2

640 1. 0262 2

543 1. 0192 2

444 1. 0184 2

9
Cesium Perchlorate, CsC104 (orthorhombic)

ASTM cards. None

Additional published patterns. None.

NBS sample. The sample of cesium perchlorate

was prepared at NBS by reacting solutions of

ammonium perchlorate and cesium bromide. It

was recrystallized several times to insure purity.

Spectrographic analysis showed the following

impurities: 0.1 to 1.0 percent of rubidium; 0.01 to

0.1 percent of sodium; and 0.001 to 0.01 percent

of aluminum.

The sample is colorless and optically negative

with the indices of refraction Na= 1.473, N/3=

1.477, and N7= 1.479. 2V^50°.

The d-values of the three strongest lines are: 3.427, 2.322, and 3.814 A.

Structural data. Biissem and Herrmann [1] in

1928 determined that cesium perchlorate has

potassium sulfate-type structure, the space group

Dli—Pbnm (No. 62), and 4(CsC104 ) per unit cell. In addition, they recognized a cubic form at

temperatures above 220 °C.

Lattice constants

a b c

A A A

1928 Biissem and Herr- 9. 84 6. 01 7. 81

mann [1]. 1930 Herrmann and 9. 870 6. 038 7. 777

Hge [2]. 1961 National Bureau 9. 848 6.029 7. 813 at

of Standards. 25 °C

The density of cesium perchlorate calculated

from the NBS lattice constants is 3.326 g/cm3 at 25 °C.

References

[1] W. Biissem and K. Herrmann, Rontgenographische

Untersuchung der einwertigen Perchlorate, Z. Krist.

67. 405-408 (1928).

[2] K. Herrmann and W. Ilge, Rontgenographische

Strukturerforschung der Kubischen Modifikationen

der Perchlorate, Z. Krist. A75, 4-166 (1930).

hkl

1961 National Bureau

of St andards Cu, 1.5405

A at 25 °C

d I

020

101

111

120

200

A

4. 92

4. 77

4. 30

4. 17

3. 909

12

17

42

6

40

021

210

121

211

002

3. 814

3. 632

3. 427

3. Ill

3. 015

76

51

100

38

45

221

131,112

022

230

122

2. 728

2. 705

2. 572

2. 514

2. 442

16

714

12

16

202

140

311, 212,

231

041

2. 386

2. 347

I 9 ^99

2. 280

7 42ou

12

222

132

330

400

103

2. 147

2. 135

2. 040

1. 952

1. 946

2

9

14

4

6

312, 331

232

410

113, 150

023

1. 932

1. 930

1. 916

1. 911

1. 861

8

78

6

10

142

411

420

123

340

1. 852

1. 826

1. 816

1. 810

1. 788

14

58

8

<1

213, 250

421

242

332,251

133

1. 758

1. 738

1. 7128

1. 6885

1. 6749

6

<1

<1

20

2

402

412, 431

152

061

1. 6388

1. 6171

1. 6132

1. 5830

213

10

4

10
Cesium Vanadium Sulfate Dodecahydrate, CsV(S04)2-12H20 (cubic)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of cesium vanadium

sulfate dodecahydrate was prepared at NBS

by R. B. Johannesen from solutions of cesium

sulfate and vanadium sulfate. Spectrograhic

analysis showed the following impurities: 0.1 to

1.0 percent aluminum; 0.01 to 0.1 percent each

of silver, calcium, chromium, iron, lithium,

magnesium, manganese, nickel, and titanium.

The sample was purple. The index of refraction

is 1.483.

The d-values of the three strongest lines are: 4.3986, 2.8535, and 2.7817A.

Structural data. The structure of cesium vana- dium sulfate dodecahydrate has not been published. Cesium vanadium sulfate dodecahydrate

appears to be a beta alum since the intensities of

the NBS pattern agree closely with those of

other beta alums. Lipson [1] in 1935 determined

the structure of the beta alums as having

the space group Tj|—Pa3 (No. 205) and

4[CsV(S04 ) 2. 12H2 0] per unit ceU.

Lattice constants

1961 National Bureau of Standards. - A

12.439 at 25 °C

The density of cesium vanadium sulfate dodecahydrate calculated from the NBS lattice constant

is 2.043 g/cm3 at 25 °C.

hkl

1961 National Bureau of Standards

Cu, 1.5405 A at 25 °C

d a

A A

111 7. 18 13 12. 44

200 6. 23 36 12. 46

210 5. 56 31 12. 44

21] 5. 08 11 12. 44

220 4. 3986 100 12. 441

221 4. 1467 23 12. 440

311 3. 7509 6 12. 440

222 3. 5913 28 12. 440

302 3. 4502 8 12. 440

321 3. 3249 19 12. 441

400 3. 1099 37 12. 440

410 3. 0163 13 12. 437

331 2. 8535 59 12. 438

420 2. 7817 54 12. 440

421 2. 7152 8 12. 443

332 2. 6511 2 12. 435

422 2. 5397 34 12. 442

431 2. 4389 3 12. 436

511 2. 3938 17 12. 439

432 2. 3103 7 12. 441

hkl

1961 National Bureau of Standards

Cu, 1.5405 A at 25 °C

d I a

A A

521 2. 2711 4 12. 439

440 2. 1994 19 12. 442

522 2. 1656 4 12. 440

531 2. 1035 4 12. 444

600 2. 0737 19 12. 442

611 2. 0183 6 12. 442

620 1. 9664 30 12. 437

621 1. 9426 4 12. 439

533 1. 8974 10 12. 442

622 1. 8750 9 12. 437

630 1. 8542 3 12. 438

444 1. 7947 5 12. 434

711 1. 7412 12 12. 435

640 1. 7247 2 12. 437

641 1. 7083 2 12. 437

721 1. 6926 2 12. 438

642 1. 6620 25 12. 437

722 1. 6469 5 12. 434

731 1. 6189 7 12. 435

732 1. 5795 1 12. 437

800 1. 5554 2 12. 443

810 1. 5430 2 12. 440

733 1. 5201 5 12. 442

820 1. 5089 15 12. 443

821 1. 4975 3 12. 439

822 1. 4658 12 12. 438

751 1. 4365 1 12. 440

662 1. 4271 12 12. 441

832 1. 4175 1 12. 439

840 1. 3906 7 12. 438

911 1. 3651 4 12. 437

842 1. 3571 4 12. 438

664 1. 3260 2 12. 439

oDl 1. oil / O£t 1 9 114

i. oUoy A 1 9 AQC

QA A Oo1 9 J.Q7

10-00 1. 2437 2 12. 437

1010 1. 2379 2 12. 441

10- 20 1. 2194 12 12. 435

10-2-2 1. 1968 2 12. 438

yoo A*± 10-4-0 1. 1547 5 12. 437

10-4-2 1. 1357 4 12. 441

945 1. 1263 2 12. 440

11-2-1 1. 1079 2 12. 436

880 1. 0993 1 12. 437

11-3-1 1. 0869 1 12. 440

10-4-4 1. 0826 1 12. 438

10-6-0 1. 0666 2 12. 439

11-3-3 1. 0551 1 12. 439

10-6-2 1. 0513 1 12. 439

Average value of last five lines, 12. 439

References

[1] H. Lipson, Existence of three alum structures, Nature

135, 1912 (1935).

11
Erbium Gallium Oxide 35, Er3 Ga2 (Ga04)3 (cubic)

ASTM cards. None.

Additional published pattenns. None.

NBS sample. The sample was prepared at

NBS by S. Schneider from stoichiometric mixtures

of erbium oxide and gallium oxide. The sample

was pressed into pellets and heated at 1,350 °C

for 6 hr; then ground, remixed, and again pressed

into pellets and heated at 1,450 °C for 6 hr.

Spectrographic analysis showed the following

impurities: 0.0001 to 0.001 percent each of

manganese and silicon.

The color of the sample was pale pink. The

index of refraction could not be determined

because the sample was too fine-grained.

The d-values of the three strongest lines are: 2.741, 2.501, and 1.6377A.

Structural data. S. Schneider, R. Roth, and

J. L. Waring [1] showed that erbium gallium

oxide has the garnet-type structure, having

the space group Ol°— Ia3d (No. 230) and

8[Er3Ga2(Ga04 ) 3] per unit cell.

Lattice constants

A

1956 Bertaut and Forrat [2]„ 12.25

1961 National Bureau of Standards. _ 12.255

at 25

°C

The density calculated from NBS lattice

constant is 7.521 g/cm^ at 25 °C.

References

[1] S. Schneider, R. Roth, and J. L. Waring, Solid state reactions involving oxides of trivalent cations, J. Research NBS 65A, 345 (1961).

[2] F. Bertaut and F. Forrat, Etude des combinaisons

des oxides des terres rares avec l'alumine et la

galline, Compt. Rend. Acad. Sci. (Paris) 243, 1219-

1222 (1956).

1961

National Bureau of Standards

hkl Cu, 1.5405 A at 25 °C

d I a A A

211 5. 003 16 12. 25 oon 4. 333 5 12. 25

oZ.-l 3 974 q 1 9 9"i

Af\f\ 4UU O.3 0fi4 UUt 39 1 9 9fi 9 741 100 1 9 9fi

422 2. 501 46 12. 25

4ol 2. 404 3 12. 26

KOI OZ1 2. 2370 l\ 1-L 9—. 9^3 -'JO

A A(\ 9£j. 11UU1 fifil A 1 9 9^3

Oil 1 Q881 1

0

1 ^j. ZfOO

631 1. 8070 l 12. 256

AAA 1. 7688 15 12. 255

C^A n 04U X. \JtJ\J£* oo33 12. 253

/ Zl 1. 6676 K 12. 254

RA O 04Z 1X. 6377 UO 1 4 <JXJ 12 25=,

732 1. 5560 3 12. 252

oUU 1. 5324 14 12. 259

DOo 1X. 4fi4fi ^vjtfcv o 12 2 C>4 coo 1. 4447 2 12. 258

/ Oi 1X. OO38771 1 I 12. 256

840 1. 3701 10 12. 254

o4Z 1. 3372 18 12. 256

fiOl yzi 1. 3212 12. 252

004 1X. 30fil OVUJX o 12. 252

ool 1. 2915 2 12. 252

932 1. 2641 3 12. 256

C\A 1 1. 2379 2 12. 255

1A 1 I 1U-1-1 1 91 33 12. 254

in n n

1U-Z-U 1. 2015 2 12. 252

in o i lU-o-1 1 1 R89 O 12. 252

10-4-0 1. 1379 12 12. 256

in O o W-6-6 1. 1282 3 12. 255

in i o 1 1 1 88 12. 256

11-2-1 1. 0918 2 12. 255

1 0839 ft 12. 255

11-3-2 1. 0585 2 12. 253

in £ n

1. 0506 2 12. 252

i o c\ o 1 091

9

X. '.'ili <± tj 12. 254

i o o n 12-2-0 1 0074 4 12. 256

11-5-2 i ooo 5 X. W\JVO; 12. 254

12-2-2 0. 9940 7 12. 255

11 A 1 ll-O-l . 9749 <1 12. 254

1 1 £J O Q^il 1 . i7U X X I 12. 254

1 O O 1 13-2-1 Q98Q I 12. 253

1 O A A 12-4-4 Q93Q 4 12. 257

12-6-0 . 9135 7 12. 256

1 o o o 13-3-2 . 9087 <1 12. 259

1 O £2 O . 9036 4 12. 257

888 . 8845 3 12. 256

14-3-1 . 8539 2 12. 256

12-8-0 . 8498 3 12. 256

14-4-0 . 8417 7 12. 255

1 4.4.° . 8339 7 12. 256

15-2-1 . 8081 2 12. 255

15-41 . 7879 3 12. 257

12-100 . 7845 8 12. 254

Average value of last five lines 12. 255

12
Europium(III) Chloride, EuCl3 (hexagonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of europium chloride

was received as a hydrate from Lindsay Chemical

Co., West Chicago, 111. It was dried for 2 hr in a hydrogen chloride atmosphere at 400 °C and

30 mm total pressure and transferred in a dry

box to a dry atmosphere sample holder which was

used to prepare the patterns. An analysis from

Lindsay Chemical Co. showed the following impurities: less than 0.2 percent combined of other

rare earths, largely samarium, gadolinium, and

neodymium.

The sample was very pale yellow. The indices

of refraction could not be determined because the

material was too hygroscopic.

The d-values of the three strongest lines are: 2.526, 2.084, and 3.469 A.

Structural data. The structure of europium

chloride has not been reported. It is assumed to

have the uranium chloride-type structure, the

space group Cih-P63/m (No. 176) and 2(EuCl3 ) per unit cell.

Lattice constants

a c

A A

1961 National Bureau 7. 375 4.134 at

of Standards. 25 °C

The density of europium chloride calculated

from the NBS lattice constants is 4.405 g/cm3 at

25 °C.

Europium Oxychloride

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of europium oxychloride was prepared at NBS by heating at 700 °C

for 5 min a sample of europium chloride from the

Lindsay Chemical Co., West Chicago, 111. Their

spectrographic analysis showed the following

impurities: a maximum as rare earth oxides of 0.2

percent (largely Sm, Gd, and Nd).

The sample was colorless. The indices of re- fraction could not be determined because the

sample was too fine.

The rf-values of the three strongest lines are: 2.559, 2.804, and 3.41 A.

Structural data. The structure of EuOCl has

not been determined; it is apparently isostructural

with PbFCl, with the space group DIh-P4/nmm (No.

129) and 2 (EuOCl) per unit cell.

1961

National Bureau

of Standards

hkl Co, 1.7889 A at 25 °C

7 a 1

A

100 6. 40 65

110 3. 687 39

101 3. 469 78

200 o i no3. 193 23

111 2. 750 41

201 2. 52b 100

210 O A 1 O

2. 413 26

300 O 1 oo 2. Iz8 a n40

211 o no a 2. 084 oo82

002 2. 066 29

102 1 no c* 1. 96b O A 220 1 O A O

1. 843 1 o12

112 1. 803 ] 7 310 1 . 770 15

202 1. 735 16

311 1 coo 1. 628 1 o 13

400 1. 59b i n10

212 1. 570 31

302 1. 483 27

410 1. 394 23

321 1. 381 29

312 1. 346 12

402 1. 264 17

501 1. 2204 6

213 1. 1967 16

322 1. 1952 16

421 1. 1582 7

412 1. 1559 15

511 1. 1053 10

EuOCl (tetragonal)

Lattice constants

1961 National Bureau of Standards _ . . _ _

.

a c

A

3. 964

A

6. 696 at 25 °C

The density of europium oxychloride calculated

from the NBS lattice constants is 6.420 g/cm3 at 25 °C.

61S033—62 3
Europium Oxychloride, EuOCl (tetragonal) —Continued

1961 National Bureau

of Standards Co, 1.7889 A

hkl at 25 °C

d T

A

-

001 6. 70 16

101 3' 41 63

002 3. 35 10

110 2. 804 74

111 2. 586 8

102 2. 559 100

003 2. 232 6

112 2. 150 24

200 1. 9817 41

103 1. 9459 4

201 1. 9012 6

113 1. 7460 20

211 1. 7143 21

202 1. 7043 5 004 1 6750 2

212 1. 5669 38

104 1. 5420 13

203 1. 4820 7 114 1. 4362 7 220 1. 4012 9

213 1. 3880 3

221 1. 3718 3

005 1. 3393 3

301 1. 2963 5 222 1. 2929 3

hkl

1961 National Bureau

of Standards Co, 1.7889 A

at 25 °C

d /

A

204 1. 2791 2 105 1. 2687 2 310 1. 2534 10

311 1. 2320 5 302 1. 2291 g

214 1. 2166 12

115 1. 2085 2 223 1. 1870 O 312 1. 1739 5

303 1. 1371 4

006 1. 1163 2 205 1. 1091 2 N

313 1. 0928 5

321 1. 0848 3

106, 224 1. 0740 <1

215 1. 0684 1 322 1. 0446 8

304, 116 1. 0364 5 314 1. 0031 5

400 0. 9909 3

Gadolinium FSuoride, GdF3 (orthorhombic)

ASTM cards

Card

number

Index

lines Radiation Source

5-0747

5-0748

1. 25

3. 24

2. 97

Chromium Zalkin [1] 1951

Additional published patterns. None.

NBS sample. The sample of gadolinium fluoride was prepared at NBS by the reaction of a

solution of gadolinium chloride and hydrofluoric

acid. It was heated at 750 °C for 10 min for additional crystal growth. The gadolinium chloride

was obtained from the Lindsay Chemical Co.,

West Chicago, 111. Their spectrographic analysis

showed the presence of the following impurities in

the chloride: a maximum as oxides of 0.1 percent

samarium and europium plus a trace of terbium.

Spectrographic analysis at NBS showed the following additional impurities in the fluoride: 0.01

to 0.1 percent of calcium, and 0.001 to 0.01 percent

each of aluminum, iron, magnesium, manganese,

lead, and silicon.

The sample was colorless. The indices of

refraction could not be determined because the

sample was too fine-grained.

The ^-values of the three strongest lines are: 3.236, 1.962, and 3.494 A.

Structural data. Zalkin and Templeton [2] in

1953 determined that gadolinium fluoride has

yttrium fluoride-type structure, the space group

D£2 Pnma (No. 62) and 4(GdF3 ) per unit cell.

Lattice constants

a b c

1953 Zalkin and Tem- A A A

pleton [2]_ 6. 570 6. 984 4. 393

1961 National Bureau

of Standards 6. 571 6. 985 4. 393

26 °C

The density of gadolinium fluoride calculated

from the NBS lattice constants is 7.056 g/cm3

at 26 °C.

14
Gadolinium Fluoride, GdF3 (orthorhombic)—Continued

1961 National Bureau

of Standards

hkl Co, 1.7889 A at 25 °C

Ci i f

A

Oil ^O. 79i £l O31X 101 o. uo o^7t 020 "X 4Q4 ft9 111 3 93ft. O. iOU 1 no 210 2. 974 60

201 o3 121 1Xo8

211 9 4K1 Qo 220 9z. oyo 9 002 2. 195 11

221 9 109 1X 71 102 9 083

112 X. t/t70e7 9f» 131, 301 1-L. Qfi1 i7U X O1 fi3 uo 230 1. 8993 36

311 1-L. 887R OO / U 1xo8

022 X. OOtJ\J 1X 9Zr 122 1X. 7881 / OO X 1X 8o 212 1X. 7fif>9 / 1X 71 040 1. 7455 11

321 1 70Q4 XIX 400 1X. R493 X*T:.tiO ft 141 11. O^7^1 OU ft\J 132, 302 1X. OO^lX 4*± ftu 312 1X. O"llX 37O 1 Qo

411 1. 5025 9

331 1 4-QQ7 1X 9A 420 1X. 48fiQ tOUt? ftu 241 1X. 4^3 rtOOtJ o 232 1. 4362 11

013 1X. 439Q rrOZiiy q 103 1 49Qt; X. *±ZjiJO /

1

\ x 322 1X. 4.1 *± X 701 \J 9

421 1 407Q

113 1. 4000 3

042 1. 3669 5

430 1X. O'i.Ldl 3497 o

142, 203 1x. 337^ oo i o

ao 051 iX. ooxo 331 ^ 4. 402, 213 1. 3146 4

151, 341 1. 3046 11 412 1. 2928 1 332 1. 2911 2 250 1. 2855 5

431 1. 2832 4

501 1. 2591 3

223 1. 2485 11

033, 511 1. 2394 7

422 1. 2312 5

303, 133 1. 2179 <1

hkl

1961 National Bureau

of Standards

Co, 1.7889 A at 25 °C

d /

313

440

521

060

IQa, Zoo,

342

A

1. 1993

1. 1967

1. 1847

1. 1643

1

1. 1601

25

5

6

7

323

432

351

1. 1496

1. 1449

1. 1378

1. 1274

2 <1

4

1

512

252, 161

531

143

1. 1127

1. 1092

1. 1075

1. 1056

1. 0922

<1

8

10

6

2

104, 610

413, 333

522

114

1. 0822

1. 0798

1. 0730

1. 0704

1. 0638

7

12

6

6

2

601

243

442, 611

024 ^9

1. 0627

1. 0615

1. 0506

1. 0485

1. 0378

5

8

4

3

5

124, 451

062

541

621, 162

C139 006

1. 0341

1. 0284

1. 0214

1. 0162

1. 0146

74

3

2

3

053

361

630

433

134

1. 0104

1. 0010

0. 9911

. 9892

. 9818

55

6

8

4

304, 262 . 9814 6

References

[1] Zalkin, Thesis TJ. California, Berkeley (1951).

[2] Allan Zalkin and D. H. Templeton, The crystal structures of YF3 and related compounds, J. Am. Chem.

Soc. 75, 2453-2458 (1953).

15
Gadolinium Oxide, Gd203 (cubic)

ATSM cards. None.

Additional published patterns. None.

NBS sample. The sample of gadolinium oxide

was prepared by the Lindsay Chemical Co., West

Chicago, IU. The sample was heated in ah to

1,200 °C for 48 hr. Their analysis showed the

following impurities: a total of less than 0.1 percent of samarium and europium, and a trace of

terbium.

Tbe sample was colorless. The index of

refraction was not determined because the sample

was too fine-grained.

The d-values of the three strongest lines are: 3.122, 1.912, and 2.704 A.

Structural data. Pauling and Shappell [1] in

1930 determined that gadolinium oxide has the

thallium-oxide type structure (rare eartb type C),

the space group T£-Ia3 (No. 206) and 16 (Gd203 ) per unit cell. Several unit cell measurements

have been converted from kX to angstrom units

for comparison with the NBS value.

Lattice constants

A

1925 Goldschmidt, Barth, and

Ulrich [2] 10. 81

1939 Bommer [3] 10. 819

1947 Iandelli [5] 10. 820

1954 Templeton and Dauben [4] 10. 813

1961 National Bureau of Standards 10. 813 at 25 °C

The density of gadolinium oxide calculated from

the NBS lattice constant is 7.616 g/cm3 at 25 °C.

References

[1] L. Pauling and M. D. Shappell, The crystal structure

of bixbyite and the C modification of the sesquioxides, Z. Krist. 75, 128-142 (1930).

[2] V. M. Goldschmidt, T. Barth, and F. Ulrich, Geochemische Verteilungsgesetze der Element IV

Zur Krystallstruktur der Oxyde der seltenen

Erdmetalle, Skrifter Norske Videnskaps-Akad. Oslo

Math. Naturv. Kl. 1925.

[3] H. Bommer, Die Gitterkonstanten der C-Formen der

Oxyde der seltenen Erdmetalle, Z. anorg. u. allgem.

Chem. 241, 273-280 (1939).

[4] D. H. Templeton and C. H. Dauben, Lattice parameters of some rare earth compounds and a set of

crystal radii, J. Am. Chem. Soc. 7G, 5237-5239

(1954).

[5] A. Iandelli, Sulle modificazioni dei sesquiossidi delle terre rare, Gazz. chim. ital. 77, 312-318 (1947).

1961

National Bureau of Standards

hkl Co, 1. 7889 A at 25 °C

d / d

A k\

211 A AO 1 91 Z in o IU. o 222 3. 122 100 10. 81 321 2. 890 2 10. 81

400 2. 704 35 10. 81

41

1

2. 548 6 10. 81

420 9 A~\ Q L. 41

0

1 IU. ol

332 2. 305 5 10. 81

422 2. 206 1 10. 81

431 2. 120 g 10. 81

521 1. 974 2 10. 81

440 1 Q1 9 oy in qi

433 1. 854 2 10. 81

600 1. 801 <1 10. 81

611 1. 754 5 10. 81

620 1. 709 1 10. 81

541 i. ooy QO

i n C9 IU. 0-£ 622 1. 6300 28 10. 812

631 1. 5946 6 10. 815

444 1. 5610 6 10. 815

543 1. 5298 2 10. 817

640 1 A OQ K

i. -lyyo 1

1 ft Q1 Q IU. olo

721 1. 4720 3 10. 817

642 1. 4454 1 10. 816

732 1. 3739 2 10. 818

800 1. 3512 4 10. 810

811 1. OoVO 1 ft GflQ iu. ouy

820 1. 3110 2 10. 811

653 1. 2925 2 10. 814

822 1. 2743 1 10. 813

831 1. 2566 3 10. 810

662 i 9/im 1. ZtVL Q8 in qi i IU. oil

840 1. 2089 4 10. 813

833 1. 1941 1 10. 813

842 1. 1798 <1 10. 813

921 1. 1663 2 10. 816

851 i. icy/ 9£i in qi 9

932 1. 1153 2 10. 813

844 1. 1035 5 10. 812

941 1. 0923 3 10. 813

10-0-0 1. 0815 1 10. 815

10-1-1 1. V/UO <-l in qi q IU. olo

10-2-0 1. 0601 4 10. 811

943 1. 0502 1 10. 812

10-2-2 1. 0405 5 10. 813

10-3-1 1. 0310 2 10. 813

871 i ni 9*7 9 in qi *3 IU. olo

10-4-0 1. 0039 3 10. 812

10-3-3 0. 9953 2 10. 812

10-4-2 . 9870 2 10. 812

954 . 97s9 in o i 910. ol2

11-2-1 . 9633 3 10. 813

880 . 9557 1 10. 812

10-4-4 . 9411 2 10. 813

11-3-2 . 9341 2 10. 813

10-6-0 . 9271 1 10. 812

11-4-1 . 9204 3 10. 813

10-6-2 . 9138 6 10. 812

965 . 9074 1 10. 813

Average value of last five lines 10. 813

16
Gadolinium Oxychloride, GdOCl (tetragonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of gadolinium oxychloride was prepared at NBS by heating at

500 °C a sample of GdCl3 obtained from the

Lindsay Chemical Co., West Chicago, 111. Their

analysis showed the following total impurities to

be less than 0.1 percent oxides of samarium,

neodymium, and yttrium, and traces of other

rare earths.

The sample was colorless. The indices of

refraction could not be determined because the

sample was too fine-grained.

The rf-values of the three strongest lines are: 2.550, 3.403, and 2.795 A.

Structural data. A reference to the structure

of gadolinium oxychloride was not found; however,

is is apparently isostructural with PbFCl, with

the space group D|h —P4/nmm (No. 129) and

2 (GdOCl) per unit cell.

Lattice constants

1961 National Bureau of Standards _ _

a c

A

3. 950

A

6. 673 at 26 °C

The density of gadolinium oxychloride calculated from the NBS lattice constants is 6.656

g/cm3 at 26 °C.

hkl

1961

National Bureau of

Standards Cu, 1.7889A

at 26 °C

d I

A

001 6. 68 30

101 3. 403 85

002 3. 339 11

110 2. 795 78

111 2. 584 6

102 2. 550 100

003 2. 222 7 112 2. 141 27

200 1. 9746 41

103 1. 9387 3

201 1. 8940 7

113 1. 7397 20

211 1. 7070 25

202 1. 6981 8

004 1. 6661 1

212 1. 5610 41

104 1. 5362 11 203 1. 4772 8

114 1. 4320 8

220 1. 3967 11

213 1. 3826 1 221 1. 3675 2

005 1. 3349 3

301 1. 2918 5

222 1. 2882 3

204 1. 2744 3

105 1. 2642 2

310 1. 2492 9

31

1

1. 2283 2

302 1. 2247 8

214 1. 2126 11

115 1. 2043 3

223 1. 1821 5

312 1. 1697 6

out) 303 1X. 1J.OOrt ^34- 9

006 1. 1124 <1

205 1. 1059 3

313 1. 0890 7

321 1. 0811 5

224, 106 1. 0708 1

215 1. 0648 2

322 1. 0407 9

304, 116 1. 0332 6

314 1. 0001 4

400 0. 9872 4

323 . 9834 1

17
Holmium Ethylsulfate Nonahydrate, Ho[(C2H5)S04]3'9H20 (hexagonal)

ASTM cards. None.

Additional published patterns. None.

MBS sample. The sample of holmium ethylsulfate nonahydrate was prepared at NBS by R.

S. Kaeser from solutions of holmium hydroxide

and diethyl sulfate. Spectrographic analysis

showed the following impurities: 0.001 to 0.01

percent zirconium and 0.0001 to 0.001 percent each

of calcium and lead.

The color of the sample was pink. It is optically negative with the indices of refraction Ne =

1.481 and N0 =1.495.

The d-values of the three strongest lines are: 4.96, 4.58, and 6.09 A.

Structural data. Ketelaar [1] in 1937 determined the structure of some of the rare earth

ethylsulfates. Holmium ethylsulfate nonahydrate is isostructural with neodymium ethylsulfate

nonahydrate, having the space group C%b —P63 /m

(No. 176) with 2{Ho[(C2 H5 )S04 ] 3 -9H2 0} per unit

cell.

Lattice constants

1961 National Bureau of Standards

a c

A

13. 928

A

7.052 at 25 °C

The density of holmium ethylsulfate nonahydrate calculated from NBS lattice constants is 1.969 g/cm3 at 25 °C.

Reference

[1] J. A. A. Ketelaar, The crystal structure of the ethylsulfates of the rare earths and yttrium, Physica 4,

619-630 (1937).

1961

National Bureau of Standards Cu, 1.5405 A

hkl at 25 °C

d J

A

100 12 13 78

110 6. 98 22

101 6. 09 85

200 6. 03 53

111 4. 96 100

201 4. 58 87

300 4. 019 53

211 3. 827 69

002 3. 526 27

301 3. 495 19

310 3. 346 20

221 3. 123 22

202 3. 044 15

311 3. 024 16

400 3. 018 10

212 2. 790 36

320 2. 769 19

302 2. 651 16

410 2. 633 17

321 2. 578 24

222 2. 481 9

312 2. 428 7

500 2. 409 5 330 2. 322

103 2. 305 3

501 2. 282 28

203 2. 190 19

322 2. 177 25

421 2. 170 28

412 2. 109 20

213 2. 088 15

511 2. 071 28

303 2. 030 2

600 2. 010 8

502 1. 991 5

430 1. 985 7 332 1. 938 10

313 1. 923 8

422, 431 1. 911 7

' 512 1. 845 10

610 1. 838 10

323 l! 791 8

611 1. 779 8

004 1 7A/1 7/ 602 1. 7460 7

440 1. 7390 5 432 1. 7284 7 114 1. 7092 5

522, 204 1. 6934 8

441 1. 6899 8

701 1. 6737 5

18
Iron Arsenide, FeAs (orthorhombic)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of iron arsenide

was made at the Geophysical Laboratory iD

Washington, D.C., by L. Clark. A mixture of

iron arid arsenic was melted at 1,060 °C in an

evacuated quartz tube and quenched at 900 °C

Spectrographic analysis showed the following impurities: 0.001 to 0.01 percent each of cobalt,

chromium, copper, manganese, molybdenum, and

nickel.

The sample was a gray opaque powder.

The d-values of the three strongest lines are: 2.588, 1.996, and 2.635 A.

Structural data. Hagg [1] in 1929 determined

that iron arsenide has the manganese phosphidetype structure, the space group D^—Pnam

(No. 62) and 4 (FeAs) per unit cell. The unitcell measurements reported by Hagg have been

converted from kX to angstrom units for comparison with the NBS values.

Lattice constants

a b c

A . A A

1929 Hagg [1] 5. 439 6. 028 3. 373

1957 Heydina; and Cal- 5. 432 6. 023 3. 372

vert [2]. 1961 National Bureau : 5- 4361 6. 0242 3. 3724

of Standards. at 25 °C

The density of iron arsenide calculated from

NBS lattice constants is 7.861 g/cm3 at 25 °C.

References

[1] G. Hagg, Rontgenographische Studien iiber das System

Eisen-Arsen, Z. Krist. 71, 134 (1929).

[2] R. D. Heyding and L. D. Calvert, Arsenides of transition metals: The arsenides of iron and cobalt, Can.

J. Chem. 35, 449 (1957).

1961 National Bureau

of Standards

hkl Co, 1.7889 A at 25 °C

d /

A

011 5

11 90ZU 2. 635 58

111 2. 588 100

910 Z 1U 2. 478 6

*901 ZU1 2. 116 17

121 2. 076 34

990 ZZU 2. 019 33

91Zl 11 1. 996 59

1 *}0 loU 1. 884 10

QlolUn 1. 735 12

031 1. 725 32

009 UUZ L 686 17

9QO ZoU 1. 616 6

Q90 OZU 1. 553 5

Q1 1 oil 1. 543 9

231 1. 457 8

1 AO L 452 8

11ZZ99 1. 421 12

oZl Q91 1. 410 6

A OO 1. 3590 5

410 1. 3255 4

999 zzz L 2942 6

4U1 1. 2605 5

1 Q9 loz 1. 2564 5

411 1. 2337 <1

312 1. 2093 7

1 t^O 10U 1. 1763 <1

ZoZ 9Q9 1. 1663 3

A91 iZl 1. 1629 4

322 1. 1423 3

430 1. 1253 5 151 1. 1107 <1

341 1. 0954 13

113 1. 0829 5 510 1. 0699 3

402 1. 0582 6

251 1. 0469 2

123 1. 0341 3

213 1. 0235 6

'Contrary to space group.

19
Lanthanum Borate, LaB03 (orthorhombic)

ASTM cards. None.

Additional published patterns. Goldschmidt

and Hauptmann [1] 1932.

NBS sample. The sample of lanthanum borate

was prepared by E. Levin [2] at NBS from lanthanum oxide and boric oxide. Spectrographic analysis showed the following impurities: 0.001 to 0.01

percent each of aluminum, calcium, and silicon;

and 0.0001 to 0.001 percent each of silver, copper,

and magnesium.

hkl

1961 National Bureau

of Standards Cu,

1.5405 A at 25 °C

d I

A Oil *±. oov 90

020 1 0

1 1

1

J. X JL 3. 492 100

120 3. 377 53

200 u. you 1 Q

121 9U. S99 (JUZl 1X 210 9u. 7fi7 i \j i QO

009 2. 553 21

201 2. 547 11 130 u. rtyo ii

211 U. TfcOO 40

031 9 494. 9^

990 2. 394 13

112 2. 252 10

022 u. X / O

1 9

040 9 Oflfi 7 122 9 0^*7 AO4Z

1 4.0 1J.. 947 t/rr i J. £7 202 1. 927 20

212 1. 875 3

231 1. 869 27

311 1. 785 22

320 1. 768 13

222 1. 746 8

240 1. 690 5

013 1. 6676 5

113, 241 1. 6039 13

142 1. 5482 11 151 1. 5176 10

400 1. 4679 5

322 1. 4539 5 213 1. 4497 12

340 1. 4207 4

242 1. 4084 5 411 1. 3906 8

420 1. 3832 4

060 1. 3764 3

233 1. 2985 9

004 1. 2769 5 402 1. 2727 10

The color of the sample was white. It is optically negative with the indices of refraction Na =

1.800, IV= 1.877, and Nr=1.822. 2V«20°.

The rf-values of the three strongest lines are: 3.492, 3.377, and 2.037 A.

Structural data. Goldschmidt and Hauptmann

[1] in 1932 determined that lanthanum borate has

the aragonite-type structure, the space group D^-

Pnam (No. 62) and 4(LaB03 ) per unit cell. The

unit cell measurements reported by Goldschmidt

1961 National Bureau

of Standards Cu,

hkl 1.5405 A at 25 °C

d I

A 313 q 4ol 1. 2556 8

260 1. 2461 7

342 1. 2412 3 351 1. 2254 6

422 1 9 1 4

1. 2117 2

440 1. 1963 2 124 1. 1944 7 204 1. 1710 6

153 X.1 1lU^U fi90 Ko Oil 1. 1339 6

520 1. 1294 6

262 1. 1199 6

413 1. 1020 3

361, 253 1x. 0QQ4 ue/tfTt o

A AO 1. 0834 2

451 1. 0725 2

149 1. Uo / o I 512 1. 0581 3

324 1. 0351 6

1. 0329 8

433 1. 0307 11 540 1. 0207 4

244 1. 0183 5

353, 015 1. 0137 5

370 1. 0098 5 452 1. 0080 3

460 1. 0038 6

115 0. 9991 6

371 . 9913 6

600 . 9785 2 404 . 9634 2 513 . 9602 7

035 . 9577 5

254 . 9550 2

542 . 9478 6

182 . 9445 3

551 . 9406 4

064, 621 . 9356 2

462 . 9344 4

20
Lanthanum Borate, LaB03 (orthorhombic)—Continued

and Hauptmann have been converted from kX

to angstrom units for comparison with tbe NBS

values.

Lattice constants

a b c

A A A

1932 Goldschmidt and

Hauptmann 5. 84 8. 24 5. 11 1961 National Bureau

of Standards 5. 872 8. 257 5. 107 at 25 °C

The density of lanthanum borate calculated

from NBS lattice constants is 5.303 g/cm3 at 25 °C.

References

[1] V. M. Goldschmidt and H. Hauptmann, Isomorphic von Boraten und Carbonaten, Nachr. Ges. Wiss.

Gottingen 1932, 53-72 (1932).

[2] E. Levin, C. Robbins, and J. Waring, Immiscibility

and the system lanthanum oxide-boric acid, J. Am.

Ceram. Soc. 44, No. 2, 87-91 (1961).

Lanthanum Chloride, LaCl:i (hexagonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of lanthanum

chloride was received as a hydrate from Lindsay

Chemical Co., West Chicago, 111. It was dried

for 30 min in vacuum at 400 °C and transferred

in a dry box to a dry atmosphere sample holder

which was used to prepare the patterns. An

analysis from Lindsay Chemical Co., showed the

following impurities: less than 0.01 percent

praseodymium and less than 0.001 percent cerium.

The sample was colorless. The indices of

refraction could not be determined because the

material was too hygroscopic.

The ^-values of the three strongest lines are: 2.603, 6.49, and 2.137A.

Structural data. Zachariasen [1] in 1948 determined that lanthanum chloride has the uranium

chloride-type structure, the space group C6h-P63/m

(No. 176) and 2 (LaCl3 ) per unit cell.

Lattice constants

a c

A A

1948 Zachariasen [1], 7. 483 4. 375

1961 National Bureau of 7. 483 4. 364 at Standards. 25 °C

The density of lanthanum chloride calculated

from the NBS lattice constants is 3.848 g/cm3 at 25 °C.

References

[1] W. H. Zachariasen, Crystal chemical studies of the 5-f series of elements, Acta Cryst. 1, 265-268 (1948).

1961

National Bureau of

Standards

hkl Cu, 1.5405 A at 25 °C

d

A

100 6. 49 79

1 1 n 3. 742 49

101 3. 622 70

200 3. 243 20

111 2. 844 33

201 2. 603 100

210 2. 450 18

002 2. 184 26

300 2. 159 44

211 2. 137 75

102 2. 071 13

112 1. 886 15

220 1. 871 9

202 1. 810 10

310 1. 797 2

311 1. 662 11 212 1. 627 11 302 1. 536 20

320 1. 486 3

222, 103 1. 419 17

321 1. 408 23

312 1. 388 5 203 1. 327 8

402 1. 299 4

213 1. 251 11

501 1. 244 5 412 1. 187 8

421 1. 1794 4

511 1. 1250 5

520, 323 1. 0383 8

21

618033—62-
Lanthanum Magnesium Nitrate 24-Hydrate, La2Mg3(N03 )i2 24H20 (trigonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of lanthanum magnesium nitrate hydrate was prepared at NBS by

Robert Kaeser from stoichiometric mixtures of

lanthanum nitrate and magnesium nitrate. Spectrographs analysis showed the following impuri1961 National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

(hex.)

T1

101 9. 24 <1

012 8. 35 100

104 f\ A'i R9OA

006 ^ 77 1 A 015 fin AO

110 5. 521 54

113 4. 984 4

202 A K07 D 107 A SQ7 JLU 024 '±. 1 OO DO

116 3. 994 94

018 3. 945 19

009 O."i Rf; OUia o 122 O. OOo 1IDft 027 J.

214 3. 335 57

1-0-10 3. 261 <1

208 ^911 ID 300 ^ 1 ft7 oo 303 O. \J i D 9

217 2. 920 4

0-2-10 2. 806 45

128 9 77 / o 132 9 fi99 00

1-1-12 2. 557 32

134 9 £QQ 1 9

2-1-10 9— ftfil

. oui OO

226 2. 491 52

0-1-14 2. 398 26

042 2. 370 1

137 2. 340 5 404 2. 306 9

318, 045 2. 261 16

232 2. 177 12

3-0-12 2. 140 45

324 2. 125 40

1-0-16 2. 113 16

1-3-10 2. 107 22

410 2. 086 15

413 2. 054 9

1-2-14 2. 043 9

327 2. 004 12

2-2-12 1. 997 23

0-2-16 1. 974 14

4-0-10 1. 966 30

ties: 0.001 to 0.01 percent strontium; and 0.0001

to 0.001 percent each of calcium, copper, iron,

and manganese.

The sample is colorless and optically negative.

The indices of refraction are Ne=1.516 and

N0 =1.521.

The G?-values of the three strongest lines are: 8.35, 3.994, and 6.43 A.

1961 National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

(hex.)

,7 aT

1

AA. 416 l. yb.z QQOO

238 i. yoo OOio

0-0-18 i. yz/ QO 2-0-17 1. 875 1 2-1-16 1. 858 14

330 1 QA 1 QO

1-1-18 1 Q 1 O i. oiy Qy 422 i. /y/ QO

2-2-15 1. 772 5 336 1. 752 8

0-1-20 1. /Uo

4-1-12 1. oyz JLo 1-3-16 1 A70 QO 428 i. ooy 0

0-0-21 1. DOUZ c*o

2-0-20 1 O.OCIA 1. ozy4 i 2-4-10 1. 0Uz4 y 600 1. 594U n

I 1-2-20 1. 5647 5 1-0-22 1. 5546 8

0-4-17 1. 5513 5

5-1-10 1. 5391 5 345 1. 5335 6

0-2-22 1. 4964 3

526 1. 4801 4

2-1-22 1. 4461 4

2-0-23 1. 4369 1 0-5-16 1. 4334 <1

1-5-14 1. 4112 5 1-1-24 1. 3972 1

2-4-16 1. 3873 2 440 1. 3801 <1

5-2-12 1. 3532 1 704 1. 3496 1 4-0-22

|

1. 3153 1 3-0-24

0-6-15 1. 3123 1 538 1. 3028 1 627 1. 2807 <1

0-4-23 1. 2741 <1

7-0-10 1. 2712 1

22
Lanthanum Magnesium Nitrate 24-Hydrate, La2 Mg3 (N03 )i 2 -24H2 0 (trigonal)—Continued

Structural data. Culvahouse and Sapp [1] in

1959 determined the structure of cerium zinc

nitrate hydrate and other rare earth magnesium

nitrate hydrates. Due to the similarity of this

pattern and cerium magnesium nitrate hydrate

we believe the two compounds to be isostructural,

having the space group D|d-R3m (No. 166) and

l[La2Mg3 (N03 )i2- 24H20] per unit rhombohedral

cell or 3[La2Mg3 (N03)i2- 24H20] per unit hexagonal cell. Lattice constants

a c

A A

1961 National Bureau of Stand- 11.042 34.66 at

ards. 25 °C

The density of lanthanum magnesium nitrate

24-hydrate calculated from NBS lattice constants

is 2.079 g/cm3 at 25 °C.

References

[1] J. W. Culvahouse and R. C. Sapp, Structure of cerium

zinc nitrate, Department of Physics and Astronomy,

University of Kansas (1959). Unpublished report

to sponsor.

Lithium Molybdate, Li2Mo04 (trigonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of lithium molybdate

was prepared at NBS by crystallization from a

solution of stoichiometric quantities of lithium

hydroxide and ammonium molybdate. Spectrographic analysis showed the following impurities:

0.01 to 0.1 percent each of calcium, silicon, and

sodium, and 0.001 to 0.01 percent each of aluminum and potassium.

The sample was colorless and optically negative

with the indices of refraction Ne = 1.433 and

N0 = 1.570.

The d-values of the three strongest lines are: 4.22, 2.920, and 4.47 A.

Structural data. Zachariasen [1] in 1926 determined that lithium molybdate has phenacite-type

structure, the space group Cfr—R3 (No. 148) and

18(Li2Mo04 ) per unit hexagonal cell or 6(Li2 Mo04 ) per unit rhombohedral cell. According to Goldschmidt [2], there also exists at high temperatures

a cubic form with spinel-type structure. Zachariasen's unit cell "a" measurement was multiplied

by V3 as suggested by Goldschmidt [3]. The cell measurements were then converted from kX to

angstrom values for comparison.

Lattice constants

a c

A A

1926 Zachariasen [1] 14. 23 9.47

1961 National Bureau of Stand- 14. 338 9.588 at

ards. 25 °C.

The density of lithium molybdate calculated

from the NBS lattice constants is 3.043 g/cm3 at

25 °C.

References

[1] W. H. Zachariasen, Note on the crystal structure of

phenacite, willemite and related compounds, Norsk

geol. tidsskr. 9, 65-73 (1926).

[2] V. M. Goldschmidt, Die Gesetze der Krystallochemie,

Geochemische Verteilungsgesetze der Elemente VII

(1926), Skrifter Norske Videns.-Akad. Oslo I. Mat.-Nat. Kl. No. 2, 1-117 (1926).

[3] V. M. Goldschmidt, Untersuchungen iiber Bau und

Eigenschaften von Krystallen, Geochemische Verteilungsgesetze VIII (1927), Skrifter Norske Videns.-

Akad. Oslo I. Mat.-Nat. Kl. (1926), 1-156 (1927).

23
Lithium Molybdate, Li2 Mo04 (trigonal)—Continued

1961

National Bureau of

hkl Standards

(hex.) Cu, 1.5405 A at 25 °C

d

A

110 7. 17 12 091 5. 21 5

mo 4. 47 38

211 4. 22 100 onn 6\)K) 4. 14 15

909 3. 794 5 990 3. 584 29

1 99 3. 353 26

131 3. 241 17

401 9

1

1

9 Q9fl oy

^1 9 9 7Q7 7

^91 9 7^n 9 410 2. 708 30

042 2. 605 8

303 2. 529 2

232 2. 449 3 330 2. 390 12 223 2. 386 12 104 2. 354 3

241 2. 279 10

502 2. 205 11 511 2. 173 <1

214 2. 136 5 422 2. 108 2

600 2. 070 3

152 2. 022 6

431 1. 997 11 520 1. 988 10 333 1. 914 14

404, 015 1. 897 4

342 1. 878 2 161 1. 858 3

324 1. SOO <1

205 1. 834 <1

125 1. 775 8

612 1. 761 <1

701 1. 744 5 ouo 1. 737 5 054 1. 724 6

621 1. 695 5 244, 315 1. 676 2

072 1. 664 1 710 1. 645 4

514, 045 1. 632 2

1961

National Bureau of

llril Standards

\IWX..) Cu, 1.5405 A at 25 °C

d

A

9K9 1. 620 2 uuo 1. 598 6

541 1. 568 2

630, 443 1. 564 4

lift 1 ID 1. 560 1

A^A 1. 554 2

0521 1. 532 <1

452 1. 509 4

271 1. 498 2

iftl AOZ 1. 485 1

71 ^ 1. 462 12

99fi 1. 460 5

722 1. 446 1 811 1. 436 <1

OOU 1. 434 2

704. 1. 427 <1

DOO 1. 4052 6

624, 345 1. 3979 4

182 1. 3906 2

yuu 1. 3792 5

1. 3764 7

1. 3651 1 820 1. 3546

615 1. 3473 <1

0

J±'± 1. 3247 1

917 1. 3148 2

ClGA 07^ 1. 3022 1 191 1. 2892 1 740 1. 2872 1 97/1 Z 9ft£ 1 4, ZOO 1. 2811 2

1 ^7 1. 2727 1 QOQ yuo, ROA DUD 1. 2652 <1

912 1. 2561 3

381 1. 2499 3

S9*^ 1. 2469 3

t^9fi OZO 1. 2449 2

1. 2242 2 921 1. 2138 1 0-10-2 1. 2019 1 AAO 7/1Q 1. 1941 3

018, 446 1. 1928 2

725 1. 1894 2

292 1. 1855 2 247 1. 1829 2

571 1. 1801 2

10-1-0 1. 1780 9

208 1. 1771 2 841 1. 1644 1

24
Lithium Oxide, Li20 (cubic)

ASTM cards. None.

Additional published patterns. Bijvoet and

Karssen [1] 1924, Bijvoet, Claassen, and Karssen

[2] 1926, Zintl, Harder, and Dauth [3] 1934,. and

Rode, Dobrynina, and Gol'der [4] 1955.

NBS sample. The sample of lithium oxide was

prepared at NBS by heating in a vacuum furnace

overnight at 650 °C a sample of lithium hydroxide

obtained from Fisher Scientific Co. To prevent

decomposition it was necessary to protect the

lithium oxide from atmospheric moisture and

carbon dioxide. A silver boat was used. Spectrographs analysis showed the following impurities

:

0.1 to 1.0 percent of calcium; 0.01 to 0.1 percent of

sodium; and 0.001 to 0.01 percent each of aluminum, silicon, and vanadium.

The sample was a very fine white powder. The

index of refraction was not determined because

the sample reacted with index liquids.

The d-values of the three strongest lines are: 2.664, 1.6307, and 1.3906 A.

Structural data. Bijvoet and Karssen [1] in

1924 determined that lithium oxide has fluoritetype structure, the space group Oi-Fm3m (No.

225), and 4(Li20) per unit cell.

Lattice constants

Bijvoet and Karssen [1] Zintl, Harder, and Dauth [3] Rode, Dobrynina, and Gol'der

[4]. National Bureau of Standards. _

A

4. 62

4. 628

4. 619

4. 6114 at 25 °C

1961 National Bureau of Standards

Cu, 1.5405 A at 25 °C

hkl

d 7 a

A A

111 2. 664 100 4. 614

200 2. 306 8 4. 613

220 1. 6307 41 4. 612

311 1. 3906 15 4. 612

400 1. 1531 3 4. 612

331 1. 0580 3 4. 6117

422 0. 9413 8 4. 6116

511 . 8875 4 4. 6117

440 . 8151 3 4. 6110

531 . 7794 5 4. 6111

Average value of last five lines 4. 6114

The density of lithium oxide calculated from

the NBS lattice constant is 2.023 g/cm 3 at 25 °C.

References

[1] J. M. Bijvoet and A. Karssen, X-ray investigation of

the crystal structure of lithium oxide, Rec. Trav.

Chim. Pays-Bas 43, 680-684 (1924).

[2] J. M. Bijvoet, A. Claassen, and A. Karssen, The

scattering power of lithium and oxygen, determined

from the diffraction-intensities of powdered lithium

oxide, Proc. Amsterdam 29, 1286-1292 (1926).

[3] E. Zintl, A. Harder, and B. Dauth, Gitterstruktur der

Oxyde, Sulfide, Selenide und Telluride des Lithiums,

Natriums und Kaliums, Z. Elektrochem. 40, 588-593

(1934).

[4] T. V. Rode, T. A. Dobrynina, and G. A. Gol'der,

Fizikokhimicheskoye izucheniye perekisi litiya, Izvest. Akad. Nauk S.S.S.R., Otdel. Khim. Nauk,

611-621 (1955).

Lithium Tungstate, Li2W04 (trigonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of lithium tungstate

was obtained from the City Chemical Co., New

York, N.Y. As received, the sample was hydrated. After heating to fusion and cooling the

sample was found to be the trigonal form. Spectrographic analysis showed the following impurities: 0.001 to 0.01 percent each of aluminum,

copper, iron, lead, molybdenum, and silicon.

The sample was colorless with the refractive

index N0 = 1 .658. Ne was not determined because

of orientation of the particles under the microscope.

The ^-values of the three strongest lines are: 4.23, 4.49, and 2.714 A.

Structural data. Zachariasen [1] in 1926 determined that lithium tungstate has phenacite-type

structure, the space group Cf rR3 (No. 148) and

18(Li2W04) per unit hexagonal cell or 6(Li2W04 )

per unit rhombohedral cell. According to Goldschmidt [2] the substance converts to a cubic

spinel-type structure at high temperatures. In

addition, there exists at room temperature a cubic

hydrate. The "a" unit-cell measurement of

Lattice constants

a c

A A

1926 Zachariasen [1] 14. 23 9. 47

1961 Zachariasen and Plettinger [37] 14. 361 9. 602

1961 National Bureau of Standards 14. 361 9. 603

at 25

°C.

25
Lithium Tungstate, Li2 W04 (trigonal)—Continued

1961 National Bureau

of Standards

hkl (hex.) Cu, 1.5405 A at 25 °C

d

A

110 7.2 12

021 5.23 6

012 4.49 46

211 4.23 100

300 4.15 10

909 3.803 6

220 3.594 23

122 3.361 33

131 3.246 18

113 2.926 33

312 2.802 3

410 2.714 35

042 2.610 17

232 2.454 5

223 2.390 21

104 2.358 7 241 2.283 12

024 2.240 3

502 2.209 12

511 2.176 2

91lj _L 4J: 2.138 7

422 2.111 3

600 2.072 3

152 2.025 7

431 2.000 10

1 34 1.971 1 333 1.918 17

404 1.9004 4

342 1.8816 3 161 1.8610 3

394 20^ 1.8367 1 125 1.7781 9

612 1.7640 2

701 1.7474 7 603 1.7403 4

054 1.7278 6

621 1.6972 7 523 1.6914 8

244, 315 1.6783 3

072 1.6661 4

710 1.6474 4

514, 045 1.6350 4

262 1.6228 1 006 1.6004 5 541 1.5710 3

Zachariasen [1] was multiplied by V3 to give the

smallest hexagonal cell measurements, which were

converted from kX to angstrom units for comparison.

The density of lithium tungstate calculated

from the NBS lattice constants is 4.560 g/cm3 at

25 °C.

1961 National Bureau

of Standards

hkl (hex.) Cu, 1.5405 A at 25 °C

d

fmo 443 1.5668 4

434 1.5567 2 081 1.5347 2 452 1.5116 4

271 1.5009 2

1.4927 <1

164, 425 1.4879 3

802 1.4794 <1

713 1.4650 10

226 1.4617 8

Oil 81 1 1.4395 2 550 1.4363 1 704 1.4279 1 461 1.4118 1 633 1.4071 8

K94 34^ 1.4003 4

182 1.3930 2

731 1.3846 <i

900 1.3816 4

416 1.3785 10

642 1.3674 2 820 1.3570 1 615 1.3498 <i

372 1.3429 <i

027 1.3401 <i

3Sfi 1.3302 <i

544 1.3267 5 217 1.3166 4

084, 075 1.3044 2

191 1.2916 1

740 1.2897 <i

274, 265 1.2833 2

137 1.2748 2

606 1.2672 <i

912 1.2583 4

407 1.2546 3

381 1.2516 2 823 1.2493 2 526 1.2475 2

814 1.2446 2

464, 455 1.2265 2 832 1.2215 1 921 1.2156 2

734, 805 1.2088 2

0-10-2 1.2040 <i

References

[1] W. H. Zachariasen, Note on the costal structure of

phenacite, willemite and related compounds, Norsk

geol. tidsskr. 9, 65-73 (1926).

[2] V. M. Goldschmidt, Die Gesetze der Krystallochemie,

Geochemische Verteilungsgesetze der Elemente VII

(1926), Skrifter Norske Videns.-Akad. Oslo I, Mat.-

Nat. Kl. No. 2, 1-117 (1926).

[3] W. H. Zachariasen and H. A. Plettinger, The crystal structure of lithium tungstate, Acta Crvst. U,

229-230 (1961).

26
Lutetium Oxii

ASTM cards. None.

Additional published patterns. Zachariasen [1]

1926.

NBS sample. The sample of lutetium oxide

was prepared by the Lindsay Chemical Co.,

West Chicago, 111. The sample was heated in air

to 1,200 °C for 60 hr. Their analysis showed the

following impurities: a total of less than 0.1

percent of ytterbium and thulium and traces of

other rare earths.

The sample was colorless. The index of re- fraction could not be determined because the

sample was too fine-grained.

The d-values of the three strongest lines are: 3.001, 2.598, and 1.837 A.

Structural data. Pauling and Shappell [2] in

1930 determined that lutetium oxide has the

thallium-oxide type structure (rare earth type C),

the space group THa3 (No. 206) and 16(Lu203 ) per unit cell. Several unit cell measurements

have been converted from kX to angstrom units

for comparison.

Lattice constants

A

1925 Goldschmidt, Barth, and Ulrich 10.39

[3]. 1939 Bommer [4] 10.396

1954 Templeton and Dauben [5] 10.391

1961 National Bureau of Standards 10.390 at 25 °C.

The density of lutetium oxide calculated from

the NBS lattice constant is 9.424 g/cm3 at 25 °C.

References

[1] W. Zachariasen, The crystal structure of the modification C of the sesquioxides of the rare earth metals

and of indium and thallium, Norske Geol. Tidsskr.

9, 310-316 (1926).

[2] L. Pauling and M. D. Shappell, The crystal structure

of bixbyite and the C modification of the sesquioxides, Z. Krist. 75, 128-142 (1930).

[3] V. M. Goldschmidt, T. Barth, and F. Ulrich, Geochemische Verteilungsgesetze der Elemente IV—Zur

Krystallstruktur der Oxyde der seltenen Erdmetalle,

Skrifter Norske Videnskaps-Akad. Oslo Math.

Nat. Kl. (1925).

[4] H. Bommer, Die Gitterkonstanten der C Formen der

Oxyde der seltenen Erdmetalle, Z. anorg. allgem u Chem. 241, 273-280 (1939).

[5] D. H. Templeton and C. H. Dauben, Lattice parameters of some rare earth compounds and a set of

crystal radii, J. Am. Chem. Soc. 76, 5237-5239

(1954).

, Lu203 (cubic)

1961

National Bureau of Standards

hkl Co, 1.7889 A at 25 °C

d J a

A A

211 4. 25 12 10. 41

222 3. 001 100 10. 40

321 2. 778 3 10. 40

400 2. 598 37 10. 39

411 2. 449 6 10. 39

420 2. 325 1 10. 40

332 2. 216 5 10. 40

422 2. 121 1 10. 39

431 2. 038 9 10. 39

521 1. 898 3 10. 40

440 1. 837 34 10. 39

433 1. 782 2 10. 39

600 1. 731 1 10. 38

611 1. 686 5 10. 39

620 1. 643 1 10. 39

541 1. 604 4 10. 39

622 1. 567 28 10. 40

631 1. 532 5 10. 39

444 1. 500 6 10. 39

543 1. 470 2 10. 40

640 1. 4413 1 10. 393

721 1. 4143 3 10. 393

642 1. 3886 2 10. 391

732 1. 3199 3 10. 393

800 1. 2989 3 10. 391

811 1. 2791 3 10. 391

820 1. 2601 2 10. 391

653 1. 2420 2 10. 391

822 1. 2246 1 10. 391

831 1. 2080 3 10. 392

662 1. 1921 7 10. 392

840 1. 1619 5 10. 392

833 1. 1477 1 10. 393

842 1. 1338 1 10. 392

921 1. 1204 2 10. 390

851 1. 0954 2 10. 392

932 1. 0719 2 10. 392

844 1. 0605 5 10. 391

941 1. 0497 3 10. 392

10-0-0 1. 0392 2 10. 392

10-1-1 1. 0290 1 10. 392

10-2-0 1. 0189 5 10. 391

943 1. 0092 1 10. 390

10-2-2 0' 9999 5 10. 391

10-3-1 . 9907 4 10. 390

871 . 9732 3 10. 391

10-4-0 . 9648 3 10. 391

10-3-3 . 9566 2 10. 391

10-4-2 . 9486 3 10. 391

954 . 9407 2 10. 390

11-2-1 . 9256 3 10. 390

880 . 9184 1 10. 390

Average value of last five lines - . 10. 390

27
Magnesium Aluminum Silicate (low-cordierite),** Mg2Al4Si5Oi8 (orthorhombic)

ASTM cards. None. Cards numbered 9-326

and 9-472 give crystallographic data for orthorhombic cordierite; however, the d-values listed

compare more favorably with the hexagonal

cordierite.

Additional published patterns. Bystrom [1] 1942; Iiyama [2] 1956; Miyashiro, Iiyama,

Yamasaki, and Miyashiro [4] 1954.

NBS sample. The sample of low temperature

cordierite was prepared at the Geophysical

Laboratory in Washington, D.C., by W. Schreyer

and J. F. Schairer from stoichiometric mixtures

of the oxides as a glass devitrified at 1,000 °C

for 3 days, and 1,380 °C for 7 days. Spectrograph^ analysis showed the following impurities:

0.01 to 0.1 percent each of calcium, iron, sodium,

and platinum; and 0.001 to 0.01 percent each of

barium, chromium, copper, nickel, and silver.

The sample is colorless. The mean index of

refraction, using a phase contrast microscope with

white light, is slightly less than 1.528.

The d-values of the three strongest lines are: 8.45, 8.52, and 3.039 A.

Structural data. Bystrom [1] in 1942 determined that orthorhombic cordierite has the space

group D^-Cccm (No. 66) and 4 (Mg2 ALSi5018 ) per unit cell. According to Bystrom [1], the

pseudo-hexagonal structure (a~b\/3) is almost

identical with that of beryl. The unit cell data

reported by Gossner and by Bystrom have been

converted from kX to angstrom units for comparison with NBS values.

Lattice constants

a b c A A A

1928 Gossner [3] 9. 80 17. 13 9. 35

1941 Bystrom [1] 9. 69 17. 06 9. 37

1954 Miyashiro Iiyama, 9. 7 17. 1 9. 3

Yamasaki, and

Miyashiro [4]. 1956 Iiyama [2]* 9. 76 17. 12 9. 33

1961 National Bureau 9. 721 17. 062 9. 339 at of Standards. 25 °C

•This data is an average of 6 sets from 6 different locations. References

[1] A. Bystrom, The crystal structure of cordierite, Arkiv.

Kemi. Mineral. Geol. 15B, No. 12, 7 (1941-42).

[2] Iiyama, Optical properties and unit cell dimensions of cordierite and indialite, Mineral. J. 1, No. 6, 372-394

(1956).

[3] B. Gossner, Structural relation between beryl and

cordierite, Central. Mineral. Geol. 1928A, 204-207

(1928).

[4] A. Miyashiro, T. Iiyama, M. Yamasaki, and T. Miyashiro, The polymorphism of cordierite and indialite,

Am. J. Sci. 253, 185-208 (1955).

[5] W. Schreyer and J. F. Schairer, Compositions and

structural states of anhydrous Mg-cordierite: A re- investigation of the central part of the system

MgO-Al2 03-Si02 , J. Petrology 2, No. 3, 324-406

(1961).

** According to Schreyer and Schairer [5].

The density of low cordierite calculated from

NBS lattice constants is 2.505 g/cm3 at 25 °C.

1961 National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

d /

A

020 8. 52 98

110 8. 45 100

130 4. 91 28

200 4. 86 10

002 4. 67 13

040 4. 27 1 112 4. 09 52

221 3. 84 1 132 3. 381 51

202 3. 369 38

042 3. 149 25

222 3. 132 56

151 3. 039 64

241 3. 035 64

311 3. 012 56

152 2. 650 22

242 2. 644 22

312 2. 637 12

260 2. 454 4

400 2. 430 5

332 2. 409 3

261 2. 373 1 004 2. 334 11 171 2. 293 2 351 2. 278 2

243 2. 234 4 313 2. 225 5 262 2. 173 5 402 2. 156 2 080 2. 132 <1

172 2. 107 11

204, 352 2. 102 11 422 2. 091 8

224 2. 044 2 280 1. 954 4

370 1. 948 6

082 1. 942 5 510 1. 932 3

263, 442 1. 925 4

281 1. 912 <1

314, 173 1. 882 8

353 1. 876 11 423 1. 870 10

460 1. 848 1 530 1. 839 2

115 1. 825 <1

461 1. 811 4

064 1. 804 7

334 1. 798 8

225, 0-10-0 1. 706 6

264 1. 691 18

28
Magnesium Aluminum Silicate (high-cordierite),* Mg2Al4Si5018 (hexagonal)

ASTM cards

Oard Index Kadiation Source

numbers lines

a 9-326 8. 54 Cobalt... Richardson and

4. 09 Rigby [2] 1949.

3. 37

* 9-472 8. 58 Copper Claringbull, British

3. 38 Museum.

3. 04

» These two cards give crystallographic data for the orthorhombic form but

the pattern contains only hexagonal spacing.

Additional published patterns. Miyashiro and

Iiyama [3] 1954 and Miyashiro, Iiyama, Yamasaki. and Miyashiro [4] 1955.

NBS sample. The sample of hexagonal cordierite was prepared at the Geophysical Laboratory in Washington, D.C., by W. Schreyer and

J. F. Schairer from stoichiometric mixtures of the

oxides as a glass devitrified at 1,000 °C for 16 days.

Spectrograph^ analysis showed the following impurities: 0.01 to 0.1 percent each of iron, nickel,

sodium, and platinum; and 0.001 to 0.01 percent

each of calcium, chromium, copper, and silver.

The sample is colorless. The mean index of

refraction, using a phase contrast microscope with

white light, is 1.528.

The 5-values of the three strongest lines are:

8.46, 3.027, and 3.138 A.

Structural data. Miyashiro and Iiyama [3] in

1954 determined that hexagonal cordierite has the

beryl-type structure, the space group D6h-P6/mcc

(No. 192) and 2(Mg2Al4Si 5018) per unit cell. Miyashiro and Iiyama [3] call hexagonal cordierite,

indialite.

Lattice constants

a c

A A

1954 Miyashiro and Iiyama [3] (natural-a) 9. 812 9. 351

1954 Miyashiro and Iiyama

(synthetic-a

)

9. 782 9. 365

1954 Miyashiro and Iiyama

(synthetic-/?) . 9. 792 9. 349

1956 Iiyama [5] . 9. 742 9. 394 b 1956 Iiyama . 9. 777 9. 358 0 1961 National Bureau of Standards _ 9. 770 9. 352

at 25

°C

b Synthesized at 1,000 °C.

c Synthesized above 1,200 °C.

The density of hexagonal cordierite calculated

from NBS lattice constants is 2.512 g/cm3 at 25 °C.

1961 National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

d

A

100 8. 48 100

110 4. 89 32

002 4. 679 15

102 4. 094 51

112 3. 379 57

202 3. 138 66

211 3. 027 86

212 2. 640 26

220 2. 441 6

302 2. 414 4

004 2. 338 12

311 2. 276 5 213 2. 231 5

222 2. 165 6

114 2. 108 8

312 2. 098 12

204 2. 046 3

320 1. 941 8

402 1. 927 Q

321 1. 901 3

313 1. 875 15

410 1. 846 6

411 1. 811 7

304 1. 800 9

412 1. 718 3

224 1. 6882 28

314 1. 6559 3

323 1. 6472 4

330 1. 6286 4

215 1. 6150 3

420 1. 5988 6

413 1. 5885 9

404 1. 5690 2 C06 1. 5584 3

332 1. 5377 3

324 1. 4935 8

116 1. 4852 5

315, 206 1. 4625 5

* According to Schreyer and Schairer [1].

References

[1] W. Schreyer and J. F. Schairer, Compositions and

structural states of anhydrous Mg-cordierite : A

reinvestigation of the central part of the system

MgO-Al2 03-Si02 , J. Petrology 2, No 3, 324-406

(1961).

[2] H M. Richardson and G. M. Rigby, The occurrence

of iron-cordierite in blast furnace linings, Min. Mag.

28, 547-554 (1949).

[3] A. Miyashiro and T. Iiyama, A preliminary note on a new mineral, indialite, polymorphic with cordierite, Proc. Japan Acad. 30, 746-751 (1954).

[4] A. Miyashiro, T. Iiyama, M. Yamasaki, and T. Miyashiro, The polymorphism of cordierite and

indialite, Am. J. Sci. 253, 185-208 (1955).

[5] T. Iiyama, Optical properties and unit cell dimensions

of cordierite and indialite, Mineral. J. 1, No. 6,

372-394 (1956).

29
Magnesium Silicate Fluoride (humite), 3Mg2Si04'MgF2 (orthorhombic)

ASTM cards

Card

numbers

Index

lines Radiation

Source

a 7-167

7-168

1. 74

2. 45

1. 48

Copper Gillery, Pennsylvania State

University

1961

National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

d I

A

020 10. 42 5 040 5. 17 9

200 O.^ 1 T

JL 1 Q

210 4. 97 18

220 4. 59 19

111 4. 20 1 121 3. 97 5

031 3. 90 12

131 3. 66 5 240 3. 64 49

201 3. 47 5 UOU 3. 453 32

211 3. 430 25

141 3. 312 32

051 3. 119 7

231 3. 102 7 151 2. 980 6

241 2. 885 6

301 2. 770 23

311 2. 744 32

161 2. 691 50

321 2. 674 5

080 2. 589 7

331 2. 572 38

420 2. 490 4

261 2. 453 4

341 2. 443 30

171 2. 438 70

430 2. 399 21

022 2. 308 8

351 2. 304 12

440 2. 297 7

271 2. 256 100

401, 122 2. 251 35

181 2. 218 17

Additional published patterns. Sahama [1]

1953.

NBS sample. The sample of humite was prepared by A. Van Valkenburg at NBS by a solid

state reaction using magnesium fluoride, quartz,

and magnesium carbonate. Spectrographic analysis showed the following impurities: 0.1 to 1.0

percent nickel; 0.01 to 0.1 percent each of aluminum, calcium, iron, and titanium; and 0.001 to

1961

National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

d 7

A

132 2. 189 7

361 2. 158 6

142 2. 107 38

222 2. 103 30

4fi0 2. 057 6

2-10-0, 291 1. 920 5 501 1. 881 7 110-1 1. 867 8

521 1. 850 1 OO 1 1. 814 6

471 1. 794 2

2-10-1 1. 779 6

391 1. 772 5 082 1. 7477 6

979 1. 7387 65

182 1. 7229 5

490, 551 1. 7117 4

481 1. 6995 3

432 1. 6859 12

3101, 630 1. 6581 10

442 1. 6486 1 372 1. 6256 2

640 1. 6213 15

452 1. 6032 4

621 1. 5863 5

3-11-1 1. 5575 4

462 1. 5525 13

1-10-2, 123 1. 5419 3

2-13-0 1. 5223 10

1. 5192 8

4-11-0 1. 5176 5

1-13-1 1. 4948 1

1. 4895 16

"670 1. 4786 69

3-12-1 1. 4644 1

1-11-2 1. 4588 1 303 1. 4326 1 163, 2-14-0 1. 4223 <1 .

30
Magnesium Silicate Fluoride (humite), 3Mg2 Si04 MgF2 (orthorhombic)—Continued

0.01 percent each of barium, cbi'omium, copper,

manganese, lead, and vanadium.

The color of the sample was cream. It is optically positive with indices of refraction

N„=1.598, N/)= 1.606, and Nr =1.630.

The ^-values of the three strongest lines are: 2.256, 2.438, and 1.4786 A.

Structural data. Taylor and West [2] in 1928

determined that humite has the space group

DJg-Pnma (No. 62) and 4(3Mg2Si04 . MgF2 ) per

unit cell. The density of humite calculated from NBS

lattice constants is 3.201 g/cm3 at 25 °C.

Lattice constants

1928

1961

Taylor and West

Gillery a_ National Bureau

of Standards.

a b c

A

10. 23

10. 25

10. 243

A

20. 86

20. 84

20. 72

A

4.738 b

4.734

4.735 at 25 °C

a Natural mineral.

b Unspecified angstrom units.

References

[1] Th. G. Sahama, Mineralogy of the humite group, Ann.

Acad. Sci. Fennicae Ser. A III. Geologia-Geographica No. 31, 1-50 (1953).

[2] W. H. Taylor and J. West, The crystal structure of the

chondrodite series, Proc. Roy. Soc. (London) 117A,

517-532 (1927-28).

31
Neodymium Borate, NdB03 (orthorhombic)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of neodymium borate

was prepared at NBS by E. Levin from neo- dymium oxide and boric oxide. A well-crystallized material was obtained by heating at 1,075 °C

for 18 hr. Spectrograph^ analysis showed the

following impurities: 0.01 to 0.1 percent europium

and 0.001 to 0.01 percent each of holmium, lanthanum, silicon, and ytterbium.

The color of the sample was light purple. The

indices of refraction could not be determined

because the sample was too fine-grained.

The d-values of the three strongest lines are: 3.427, 3.300, and 2.377 A.

Structural data. According to Levin, Roth,

and Martin [1], neodymium borate is isostructural

with calcium carbonate, aragonite-type structure,

the space group D^-Pnam (No. 62) and 4(NdB03 ) per unit cell.

Lattice constants

a 6 c

A A A

1961 National Bureau 5. 729 8. 080 5.041 at

of Standards. 25 °C

The density of neodymiun borate calculated

from NBS lattice constants is 5.779 g/cm3 at 25 °C.

Reference

[1] E. Levin, R. Roth, and J. Martin, Polymorphism of AB03 type rare earth borates, 46, 1030-1055 (1961).

Am. Mineralogist.

Neodymium Borate, NdB03 (orthorhombic)

1961 National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

d I

~ A

011 4. 273 18

020 4. 039 10

111 3. 427 100

120 3. 300 51

200 2. 865 18

121 2. 763 5

210 2. 701 5

002 2. 520 18

130 2. 438 6

211, 031 2. 377 46

220 2. 336 11 112 2. 217 5 022 2. 138 11 040 2. 019 8

122 2. 003 39

140 1. 094 22

202 1. 893 19

231 1. 828 30

311 1. 744 21

320 1. 727 12

222 1. 714 6

240 1. 650 6

013 1. 646 8

113 1. 581 13

142 1. 519 11

151 1. 4860 10

033 1. 4257 15

410 1. 4102 3

340 1. 3877 4

242 1. 3812 7

411 1. 3585 6

251 1. 3558 7

060 1. 3467 5

233 1. 2766 11 004 1. 2604 5

313 1, 2465 11

ZDZ, 4ol 1. 2273 10

260 1, 2182 12

114, 342 1, 2162 12

351 1, 1986 7

062 1. 1881 6

243 1. 1778 7

204 1. 1541 4

153 1. 1414 5

352 1. 1077 8

171 1. 1041 8

262 1. 0974 6
Neodymium Chloride, NdCI3 (hexagonal)

ASTM cards

Card

number

Index

lines Radiation Source

3-0078 6. 40

2. 55

2. 10

Molybdenum Dow Chemical

Co.

Additional published patterns. None.

NBS sample. The sample of neodyniium

chloride was received as a hydrate from Lindsay

Chemical Co., West Chicago, 111. It was dried for

45 min in vacuum at 400 °C and transferred in a dry box to a dry atmosphere sample holder which

was used to prepare the patterns. An analysis

from Lindsay Chemical Co., showed the following

impurities: less than 0.1 percent combined of other

rare earths, largely praseodymium and samarium.

The sample was colorless. The indices of re- fraction could not be determined because the

material was too hygroscopic.

The d-values of the three strongest lines are: 2.556, 2.105, and3.535A.

Structural data. Zachariasen [1] in 1948 determined that neodymium chloride has the uranium

chloride-type structure, the space group C|h P63 /m (No. 176) and 2(NdCl3 ) per unit cell.

Lattice constants

1948

1961

Zachariasen [1-

a c

A

7. 396

7. 400

A

4.240

4.240 at 25 °C.

National Bureau of Standards.

The density of neodymium chloride calculated

from the NBS lattice constants is 4.138 g/cm3 at

25 °C.

hkl 1961 National Bureauof Standards Cu, 1.5405

A at 25 °C

d I

A

100 6. 42 67

110 3. 702 41

101 3. 535 68

200 3. 208 22

111 2. 788 31

201 2. 556 100

210 2. 422 22

300 2. 137 45

002 2. 122 45

211 2. 105 77

102 2. 014 27

220 1. 851 15

112 1. 840 17

310 1. 778 9

202 L 769 9

311 1. 639 14

212 1. 595 14

302 1. 504 22

320 1. 471 6

410 1. 3985 20

222 1. 3937 20

321 1. 3890 25

312 1. 3625 6

203 1. 2927 9

213 1. 2210 16

412 1. 1671 16

511 1. 1108 8

323, 114 1. 0187 11

References

[1] W. H. Zachariasen, Crystal chemical studies of the

5-f series of elements, Acta Cryst. 1, 265-268 (1948).

33
Neodymium Gallium Oxide 3:5, Nd3 Ga2 (Ga04)3 (cubic)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample was prepared at NBS

by S. Schneider from stoichiometric mixtures of

neodymium oxide and gallium oxide. The samples were pressed into pellets and heated at 1,000 °C

for 12 hr, then ground, remixed, and again pressed

into pellets and heated at 1,350 °C for 6 hr. Spectrographic analysis showed the following impurities:

0.01 to 0.1 percent europium and 0.001 to 0.01 percent each of aluminum, holmium, lanthanum,

silicon, and ytterbium.

The color of the sample was light purple. The

index of refraction is 1.985.

The d-values of the three strongest lines are: 2.796, 2.553, and 1.6712 A.

Structural data. Keith and Roy [1] in 1954

showed that double oxides of trivalent elements in

these proportions may have the garnet-type

structure. Neodymium gallium oxide is isostructural with other double oxides of trivalent

elements, having the space group O£0 —Ia3d (No.

230) with 8[Nd3 Ga2 (Ga04 ) 3 ] per unit cell.

Lattice constants

A

1961 National Bureau of Standards,

_

12.506

at 25 °C.

The density calculated from the NBS lattice

constant is 6.609 g/cm3 at 25 °C.

References

\\] M. L. Keith and R. Roy, Structural relations among

double oxides of trivalent elements, Am. Mineralogist 39 Nos. 1 and 2, 1-23 (1954).

1961

National Bureau of Standards

flKl Cu, 1.5405 A at 25 °C

al I a

A A

0 1 1 Lll 5. 107 15 12. 51

llV 4. 420 6 12. 50

6L1 3. 342 11 12. 50

a ftft 4UU 3. 128 29 12. 51

420 2. 796 100 12. 50

66L 2. 669 1 12. 52

A OO 111 2. 553 46 12. 51

A "2 1 2. 452 3 12. 50

CO 1 OL 1 2. 283 11 12. 50

440 2. 211 .ii- 12. 51

Oil 2. 029 lS 12. 51

Aon OLO 1. 977 2 12. 51

Ool 1. 843 4 12. 50

AAA 444 1. 805 16 12. 51

640 1. 735 29 12. 51

1 Li 1. 701 6 12. 50

D4i4 1. 6712 37 12. 505

/ 6L 1. 5883 9 12. 504

oUU 1. 5630 15 12. 504

840 1. 3982 ,9 u

12. 507

Q 1 O o4.£ 1. 3646 20 12. 507

OO 1 \)L 1 1. 3489 3 12. 509

OU4 1. 3333 8 12. 507

1 ft O ft 1U-2-U 1. 2267 5 12. 510

10-3-1 1. 1923 4 12. 505

1 ft A ft 10-4-U 1. 1614 17 12. 509

1 f\ Q Q 1. 1513 2 12. 506

1 ft A O 1U-4-.J 1. 1417 10 12. 507

1

]

-L- 1 1. 1143 3 12. 508

880 1. 1056 9 12. 508

1 1 •

.

i L 1. 0801 2 12. 503

1 O ft ft lz-l)0 1. 0422 7 12. 506

1 O O ft LL-LV 1. 0281 9 12. 507

11-5-/ 1. 0212 6 12. 507

12-2-2 1. 0146 10 12. 509

Ll-O-d 0. 9707 3 12. 503

1 O O 1 16-L- 1 . 9482 1 12. 507

1 O A A lz-4-4 . 9425 7 12. 504

1 O C ft lL-OU . 9321 13 12. 505

13-3-2 . 9272 2 12. 509

1 o c o lZ-D L . 9219 6 12. 505

OO o 8»0 . yvLO ft 1L. DUD

1 A O 1 14-3-1 . 8715 3 12. 508

1 O O ft

. 8670 4 12. 504

14-4-0 . 8589 13 12. 506

14-4-2 . 8510 10 12. 507

lO' L' L . 8245 4 12. 504

15-3-2 . 8107 2 12. 507

12-10-0 . 8007 13 12. 507

14-7-1 . 7973 2 12. 505

14-6-4 . 7941 10 12. 507

Average value of last five lines. 12. 506

34
Nickel Arsenic Sulfide (gersdorffite), NiAsS (cubic)

ASTM cards. None.

Additional published patterns

Source

Olshausen [1] 1925_

Harcourt [2] 1942..

Radiation

Copper

Copper

NBS sample. The sample of gersdormte was

prepared by R. Yund of the Geophysical Laboratory at 725 °C. Spectrograph^ analysis showed

the following impurities: 0.001 to 0.01 percent

each of aluminum, copper, and iron; and 0.0001 to

0.001 percent each of silver and magnesium.

The sample was a gray opaque powder.

The ^-values of the three strongest lines are: 2.545, 2.325, and 1.7163A.

Structural data. Peacock and Henry [3] in 1947

determined that gersdormte has the pyrite type

structure, the space group T£ —Pa3 (No. 205),

and 4(NiAsS) per unit ceU. Several unit cell measurements have been converted from kX to

angstrom units for comparison with the NBS

value.

Lattice constants

A

1925 Olshausen [1] 5. 731

1925 Ramsdell [4] 5. 69

1926 Goldschmidt [5] 5. 72

1947 Peacock and Henry [3] 5. 66

1961 National Bureau of Standards. _ 5. 692 at 25 °C

The density of gersdormte calculated from the

NBS lattice constant is 5.966 g/cm3 at 25 °C.

1961 National Bureau of Standards

Cu, 1.5405 A at 25 °C

hkl

d a

A a ; 111 3. 285 5 5. 690

002 2. 848 59 5. 696

021 2. 545 100 5. 692

119 L±£t 2. 325 88 5. 694

022 2. 013 33 5. 693

113 1. 7163 79 5. 692

222 1. 6436 10 5. 694

023 1. 5786 10 5. 692

1. 5214 37 5. 693

004 1. 4232 6 5. 693

133 1. 3057 3 5. 691

024 1. 2730 6 5. 693

124 1. 2422 15 5. 692

zoo 1. 2138 7 5. 693

224 1. 1616 6 5. 691

115 1. 0955 20 5. 692

025 1. 0571 14 5. 693

125 1. 0393 g 5. 692

1. 0063 20 5. 692

006 0. 9485 1 5. 691

061 . 9357 2 5. 692

116 . 9233 18 5. 692

026 . 8998 4 5. 691

'. 8888 4 5. 691

335 . 8680 8 5. 692

226 . 8580 4 5. 692

063 . 8485 10 5. 692

136 . 8393 7 5. 692

444 . 8215 1 5. 692

236 . 8131 3 5. 691

117 . 7970 1 5. 692

046 . 7893 8 5. 692

146 . 7819 14 5. 692

Average value of last five lines 5. 692

References

[1] S. v. Olshausen, Strukturuntersuchungen nach der

Debye-Scherrer Methode, Z. Krist. 61, 463-514

(1925).

[2] G. A. Harcourt, Tables for the identification of minerals

by X-ray Powder Patterns, Am. Mineralogist 27, 63

(1942).

[3] M. A. Peacock and W. G. Henry, The crystal struc- tures of cobaltite (CoAsS), gersdorffite (NiAsS), and

ullmannite (NiSbS), Univ. Toronto Studies, Geol.

Series 52, 71 (1947).

[4] L. S. Ramsdell, The crystal structure of some metallic

sulfides, Am. Mineralogist 10, 281 (1925).

[5] V. M. Goldschmidt, Geochemische Verteilungsgesetze

VIII, Skrifter Norske Vidensk. Akad. Oslo, Math.

Nat. Kl. 8, 390 (1926-27).

35
Nickel (II) Carbonate, NiCOs (trigonal)

ASTM cards. None.

NBS sample. The sample of nickel carbonate

was prepared by Thelma Isaacs at NBS by heating

basic nickelous carbonate (Fischer's reagent),

solid C02 , and distilled water in a Morey bomb at

270 °C for two weeks. Spectrograph^ analysis

showed the following impurities: 0.01 to 0.1 percent of sodium; 0.001 to 0.01 percent each of

aluminum, copper, platinum, and silicon.

The color of the sample was green. It was

optically negative with the indices of refraction

N0 =1.913 and Ne =1.696.

The d-values of the three strongest lines are: 2.708, 3.512, and 1.6811 A.

Structural data. Bizette and Langles [1] in

1950 determined that nickel carbonate has calcitetype structure, the space group Dfd —R3c (No.

167) and 6(NiC03 ) per unit cell. The rhombohedral cell reported by Bizette

and Langles was converted to hexagonal for

comparison.

Lattice constants

a c

A A

1950 Bizette and Langles 4. 596 14.622

1961 National Bureau of Stand- 4. 609 14.737 at

ards. 25 °C.

The density of nickel carbonate calculated from

the NBS lattice constants is 4.362 g/cm3 at 25 °C.

References

[11 H. Bizette and R. de Saint-Leon Langles, Preparation

d'un carbonate de nickel neutre rhomboedrique,

Bull. soc. chim. France 1041, (1950).

1961 National Bureau

of Standards

hkl (hex.) Cu, 1.5405 A at 25 °C

d 7

A

012 O."3 uIa9 to

2. 708 100

1 1 n 2. 304 27

1 1 o

1 lo 2. 086 34

1. 926 28

024

1 1 A 1 ID 1. 6811 43

niU a1 o 1. 6734 37

91 1 1. 5001 2

1 99 1. 4782 17

214 1. 3961 1 o L 3834 3

1. 3542 6

1 1 Q 1. 3351 9

1. 3310 14

0-0-12 1. 2287 K 917 l! 2262 3 n 9 i n 1. 1857 2

1 9R 1. 1672 6

990 1. 1526 1

1-1-12 1. Uo4o A4

1. 0606 4

91 in 1. 0546 3

99fi 1. 0435 4

0-1-14 1. 0175 <1

1-2-11 1. 0010 9

404 0. 9633 3

318 . 9490 5

2-0-14 . 9310 <1

232 . 9088 2

2-1-13 . 9067 1 1-1-15 . 9036 1 3-0-12 . 9027 4

407 . 9006 2

36
Nickel Sulfide, millerite, NiS (trigonal)

ASTM cards

Card

number

Index

lines Radiation Source

3-0760 2. 77

1. 85

2. 50

Copper Harcourt [1] 1942

Additional published patterns. Alsen [2] 1925;

Kolkmeijer and Moseveld [3] ; Levi and Baroni [4]. NBS sample. The sample of millerite was

obtained from the National Museum, catalog

#113065. Spectrographic analysis showed the following impurities: 5 percent iron; 0.1 to 1.0

percent arsenic, cobalt, copper, and silicon;

0.01 to 0.1 percent each of aluminum, calcium,

magnesium, manganese, and zinc; and 0.001 to

0.01 percent each of silver and barium. A small

amount of chalcopurite, CuFeS, was present as an impurity in the physical mixture.

The sample was a gray opaque powder.

The ^-values of the three strongest lines are: 2.777, 1.8631, and 2.513 A.

Structural data. Alsen [2] in 1925 determined

that millerite has the space group C|v —R3m

(No. 160) and 9 (NiS) per unit hexagonal cell or 3 (NiS) per unit rhombohedral cell. Several

unit cell measurements have been converted

from kX to angstrom units for comparison with

the NBS value.

Lattice constants

a c

A A

1925 Alsen [2] 9. 62 3. 16

1926 Ott [5] 9. 63 3. 161

1931 Kolkmeijer and Moseveld 9. 609 3. 171

[3]. 1935 Levi and Baroni [4] 9. 63 3. 16

1947 Lundqvist [6] 9. 610 3. 151

1961 National Bureau of 9. 620 3. 149

Standards. at 25 °C

The density of millerite calculated from the

NBS lattice constant is 5.374 g/cm3 at 25 °C.

1961 National Bureau

of Standards

hkl (hex.) Cu, 1.5405 A at 25 °C

d /

A

110 4. 807 62

101 2. 946 41

300 2. 777 100

021 2. 513 64

220 2. 406 12

211 2. 228 56

131 1. 8631 97

410 1. 8178 43

401 I. 7372 42

321 1. 6340 17

330 1. 6037 35

012 1. 5470 27

600 1. 3884 8

520 1. 3343 4

312 1. 3008 9

042 1. 2560 8

440 1. 2023 6

161 1. 1783 4

502 1. 1447 5

422, 701 1. 1133 15

710 1. 1033 7

152, 621 1. 0846 8

342 1. 0333 12

541 1. 0104 6

fil

1? 081 0. 9888 6

303 . 9820 8

262, 811 . 9316 8

461 . 9143 <3

413, 820 . 9090 6

731 . 8984 8

740 . 8640 5

References

[1] G. A. Harcourt, Tables for the identification of ore minerals by X-ray powder patterns, Am. Mineralogist 27, 63-113 (1942).

[2] N. Alsen, Rontgenographische Untersuchung der

Kristallstructuren von Magnetkies, Breithauptit,

Pentlandit, Millerit, und verwandten Verbindungen,

Geol. Foren. i. Stockholm Forh. 47, 19-72 (1925).

[3] N. H. Kolkmeijer and A. L. Th. Moseveld, Uber die

Dichte und Struktur des Millerits (rhomboedrischen

Nickelsulfids), Z. Krist. 80, 91 (1931).

[4] G. R. Levi and A. Baroni, Struttura ed alterazioni di struttura di NiS e di NiSe, Z. Krist. A92, 210-215

(1935).

[5] H. Ott, Die Strukturen von MnO, MnS, AgF, NiS,

SnI, SrCl, BaF; Prazisionsmessungen einiger Alkalihalogenide; Z. Krist. 63, 222-230 (1926).

[6] D. Lundqvist, X-Ray studies on the binary system

Ni-S, Arkiv. Kemi Mineral. Geol. 24A, No. 21, 1-12

(1947).

37
Potassium Dihydrogen Arsenate,

ASTM cards. None.

Additional published patterns. None.

NBS sample. Potassium dihydrogen arsenate

was prepared at NBS by dissolving arsenic trioxide

in nitric acid and then adding a solution of potassium carbonate. The purity of the sample was

improved by several recrystallizations. Spectrographic analysis showed the following impurities:

0.01 to 0.1 percent each of sodium and lead, and

0.001 to 0.01 percent each of aluminum, antimony,

calcium, copper, iron, magnesium, and silicon.

The sample was colorless and optically negative

with the refractive indices N0 = 1.562 and Ne =

1.519.

The ^-values of the three strongest lines are: 3.810, 2.980, and 2.000 A.

Structural data. Helmholtz and Levine [1] in

1942 discovered that potassium dihydrogen arse- nate is an isotype of potassium dihydrogen phosphate, with the space group D2d-I42d (No. 122)

and 4(KH2As04 ) per unit cell. Several unit cell measurements have been converted from kX to

angstrom units for comparison with the NBS

values.

KH2As04 (tetragonal)

Lattice constants

a c

1942

1946

Helmholtz and Levine [1]-. Frevel, Rinn and Anderson

[2]. Dickson and Ubbelohde [3]_

National Bureau of Standards.

A

7. 67

7. 63

A

7. 18

7. 13

1950

1961

7. 624

7. 630

7. 163 at 18 °C

7. 163 at 25 °C

The density of potassium dihydrogen arsenate

calculated from the NBS lattice constants is 2.866

g/cm3 at 25 °C.

References

[1] L. Helmholtz and R. Levine, A determination of

parameters in potassium dihydrogen arsenate and

silver arsenate, J. Am. Chem. Soc. 64, 354-358

(1942).

[2] L. K. Frevel, H. W. Rinn, and H. C. Anderson, Tabulated diffraction data for tetragonal isomorphs, Ind.

Eng. Chem. Anal. Ed. 18, 83-93 (1946).

[3] D. H. W. Dickson and A. R. Ubbelohde, The hydrogen

bond in crystals. VIII. The isotope effect in KH2As04 , Acta Cryst. 3, 6-9 (1950).

hkl

1961 National Bureau

of Standards

Cu, 1.5405 A at 25 °C

a /

A

i1U1ni 5. 21 65

200 3. 810 100

211 3. 078 28

112 2. 980 87

220 2. 697 31

909 2. 610 6

310 2. 412 4

301 O OAT

2. 397 <1

321 2. 029 8

312 2. 000 72

91 3 1. 956 4

400 1. 908 9

411, 004 1. 792 4

303 1. 741 5

420 1. 707 18

9f>4. 1. 622 14

332 1. 6070 18

323 1. 5833 3

422 1. 5405 1 501, 224 1. 4925 13

1. 4629 2 314 1. 4379 1 105 1. 4071 <1

521 1. 3897 3

512 1. 3808 16

1. 3491 3

215 1. 3209 <1

404 i one a 1. 3054 6

503 1. 2852 1 600 1. 2716 22

0\JO 1. 2482 1 611, 424 1. 2353 8

532 1 OOA1

1. 2291 12

523 1. 2184 <1

620 1. 2066 10

1. 1985

325 1. 1865 1 541 1. 1754 2

116 1. 1656 3 415 1. 1331 <1

Oo l 1. 1232 1 613 1. 1103 1 701, 444 1. 0776 2

316 1. 0700 4

640 1. 0581 2

791 AOA 1. 0369 2

712 1. 0332 10

642, 107 1. 0142 1 406 1. 0118 <1

624 1. 0004 2

OOD 0. 9944 1 426 . 9774 <1

651 . 9679 <1

732 . 9648 6

800 . 9538 1

615 . 9435 <1

38
Praseodymium Chloride, PrCl3 (hexagonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of praseodymium

chloride was received as a hydrate from Lindsay

Chemical Co. Chicago, 111. It was dried for 2

hr in vacuum at 400 °C and transferred in a dry

box to a dry atmosphere sample holder which was

used to prepare the patterns. An analysis from

Lindsay Chemical Co., showed the following impurities: less than 1 percent combined of lathanum,

neodymium, and smaller amounts of cerium and

samarium.

The sample was very pale green. The indices

of refraction could not be determined because the

material was too hygroscopic.

The d- values of the three strongest lines are: 2.571, 2.112, and 3.56A.

Structural data. Zachariasen [1] in 1948 determined that praseodymium chloride has the ura- nium chloride-type structure, the space group

CIu-P63 /m (No. 176) and 2 (PrCl 3 ) per unit cell.

Lattice constants

1948

1961

Zachariasen [1] National Bureau of Standards

a c

A

7. 42

7. 423

A

4. 26

4. 272

at 25 °C

The density of praseodymium chloride calculated from the NBS lattice constants is 4.027

g/cm 3 at 25 °C.

1961 National Bureau

of Standards Cu,

lift, I 1.5405 A at 25 °C

d /

i1UUoo 6. 46 56

110 3. 72 41

101 i. 56 65

3. 22 16

111 111 2. 81 28

901 2. 571 100

210 2 429 19

300 2. 140 58

91 1 2. 112 79

1 09 2. 027 31

119 1. 853 25

310 1. 782 1 202 L 779 }

17

*<i Oili 1. 645 15

919 1. 604 18

1. 512 23

320 1. 475 4

222 1. 402 22

321 1. 394 30

312 1. 369 8

203 1. 302 11 213 1. 229 17

412 1. 173

421 1. 169 } "

511 1. 1148 10

323 1. 0241 12

References

[1] W. H. Zachariasen, Crystal chemical studies of the 5-f

series of elements, Acta Cryst. 1, 265-268 (1948)

39
Samarium Chloride, SmCl3 (hexagonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of samarium chloride

was received as a hydrate from Lindsay Chemical

Co., West Chicago, 111. It was dried for one and

one-half hours in vacuum at 400 °C and transferred

in a dry box to a dry atmosphere sample holder

which was used to prepare the patterns. An

analysis from Lindsay Chemical Co., showed the

following impurities: less than 0.1 percent combined of other rare earths, largely neodymium,

gadolinium, and europium.

The sample was colorless. The indices of

refraction could not be determined because the

material was too hygroscopic.

The ^-values of the three strongest lines are: 2.538, 2.090, and 3.494A.

Structural data. The structure of samarium

chloride has not been reported. It is assumed to

have the uranium chloride-type structure, the

space group Cih-P63 /m (No. 176) and 2(SmCl3 ) per unit cell. Lattice constants

a c

A A

1961 National Bureau of Stand- 7. 380 4. 169

ards. at 25 °C

The density of samarium chloride calculated

from the NBS lattice constants is 4.334 g/cm3

at 25 °C.

1961 National Bureau

of Standards

IlKl Cu, 1.5405 A at 25 °C

d I

A

1 art J.UU 6. 393 66

1 J U 3. 694 49

iUi 3. 494 75

200 3. 198 21

111

on i 2. 538 100

O 1 f\ 2. 416 20

oUU 2. 131 36

211 2. 090 90

102 ID

1. 845 12

llz 1. 814 1 oW 1. 77 Z 13

202 1. 746 10

311 1. 630 13

400 1. 5973 10

212 1. 5783 15

302 1. 4895 21

410 1. 3946 14

321 1. 3833 30

312 1. 3506 9

203 1. 2744 10

501 1. 2224 14

213 1. 2046 12

412 1. 1594 18

511 1. 1066 9

323 1. 0087 14

40
Samarium Fluoride, SmF3 (hexagonal)

ASTM cards

Card Index Radiation Source

numbers lines

3-1046 2. 02 Copper Oftedal [1] 1929

1. 97

1. 16

5-0563 3. 12 Chromium Zalkin [2] 1951

2. 00

1. 96

Additional published patterns. None.

NBS sample. The sample of samarium fluoride

was prepared at NBS by reacting samarium oxide

with hydrofluoric acid. It was heated at 900 °C

for 5 min to improve the pattern. Spectrographic

analysis showed the following impurities: 0.01 to

0.1 percent each of aluminum, calcium, and silicon;

and 0.001 to 0.01 percent each of iron and magnesium.

The color of the sample was very light gray.

The indices of refraction could not be determined

because the sample was too fine-grained.

The rf-values of the three strongest lines are: 3.13, 1.960, and 2.008 A.

Structural data. Oftedal [3] in 1931 determined

that samarium fluoride has the sapce group D|h P63 /mcm (No. 193) with 6(SmF3 ) per unit cell. Samarium fluoride is isomorphous with lanthanum

fluoride, which is used as a structure type. At

high temperatures, hexagonal samarium fluoride

converts to an orthorhombic form. The unit-cell

measurements of Oftedal have been converted

from kX to angstrom units for comparison with

the NBS values.

Lattice constants

a c

A A

1929 Oftedal [1] 6. 994 7. 164

1953 Zalkin and Templeton [4]__ 6. 956 7. 120

1961 National Bureau of Stand- 6. 952 7. 122 at

ards. 26 °C

The density of samarium fluoride calculated

from the NBS lattice constants is 6.928 g/cm3 at

26 °C.

1961 National Bureau

of Standards

hkl Cu, 1.5405 A at 26 °C

d I

A

6. DO A fk 110 o. 4o onoU

111 3. 13 100

1 1 o 2. 487 10

oUU 54

1 1 o Yi6 i. you COOo

004 i 77a i. / #y oy 302 1. 748 36

1. 689 19

1 1 A 114 1 K.QA 1. Oo4 y

ALL 1. ooz Qo

223, 214 1. 4UZZ 1 7

304 1. 3316 10

1 1 C 115 1. 3180 12

A 1 1 411 1. ZvZl 1 7

OO/I ZZ4 1 OA QA 1. Z4oD r0

412 1. Zooo 11 006 1. 1870 6

ooO 1. 1588 9

119 ACiA 413, 4U4 1. 1497 12

1 ID 1. 1233 5

332, 225 1. 1019 12

414 1. 0569 2

306 1. 0216 8

600 1. 0032 5

226 0. 9803 <1

117 . 9765 1 334 . 9711 3

415, 602 . 9657 10

521 . 9555 8

References

[1] I. Oftedal, tjber die Kristallstruktur von Tysonit und

eiainigen kiinstlich dargestellten Lanthanidenfiuoriden, Z. physik. Chem. B5, 272-291 (1929).

[2] Zalkin, Thesis, U. California, Berkeley (1951).

[3] I. Oftedal, Zur Kristallstruktur von Tysonit (Ce,

La, . . .)F3 , Z. physik. Chem. IB13, 190-200

(1931).

[4] A. Zalkin and D. H. Templeton, The crystal structures

of YFS and related compounds, J. Am. Chem. Soc.

75, 2453-2458 (1953).

41
Samarium Gallium Oxide 3:5, Sm3 Ga2(Ga04)3 (cubic)

ASTM cards

Card numberIndex

lines Radiation Source

8-188 2. 76

2. 53

1. 66

Copper Keith and Roy [1] 1954.

Additional published patterns. None.

NBS sample. The sample was prepared at

NBS by S. Schneider from stoichiometric mixtures of samarium oxide and gallium oxide. The

samples were pressed into pellets and heated at

1,350 °C for 6 hr, then ground, remixed, and

again pressed into pellets and heated at 1,650 °C

for 6 hr. Spectrograph^ analysis showed the

following impurities: 0.01 to 0.1 percent dysprosium and 0.001 to 0.01 percent each of aluminum,

gadolinium, lanthanum, silicon, and thulium.

The color of the sample was yellowish white.

The index of refraction is >2.00.

The d-values of the three strongest lines are: 2.781, 2.540, and 1.6614 A.

Structural data. Keith and Roy [1] in 1954

showed that double oxides of trivalent elements had

the garnet structure. The garnets have the space

group pif-IaSd (No. 230) with 8 [Sm3 Ga2 (Ga04 )3] per unit cell.

Lattice constants

A

1954 Keith and Roy [1] 12.355

1961 National Bureau of Standards.- 12.432 at 25 °C

The density calculated from the NBS lattice

constant is 6.854 g/cm3 at 25 °C.

References

[1] M. L. Keith and R. Roy, Structural relations among

double oxides of trivalent elements, Am. Mineralogist 39 Nos. 1 and 2, 1-23 (1954).

1961

National Bureau of Standards

hkl Cu, 1.5405 A at 25 °C

d / a

A

x\. AA

211 O.^ 081 Uol lo 11) A C 220 A A(\1 O

19 /IK "391 3. 321 10 12. 43

400 3. 108 31 12. 43

420 9 7ft 1 Z. / oi i on 1UU lO i A XZ. 44

422 AA iZ. 44

431 9 AAC\ Qo 19 A A iZ. 44

^91 2. 271 13 12. 44

440 2. 199 4 12. 44

611 9 01 R 1 1 xz, 4o

631 1 9."\A. QO 19 A A iZ. 44

444 1 7Q4 1 7 lO AO LZ. 4o

fi40 1. 724 33 12. 43

721 1. 692 5 12. 44

642 1. DDI OO 19 A Q 1Z. 4o

732 1 ^70 A 19 A A 1.6. 44

800 11. OOiO 11Z.9 4o4

S4.fl 1. 3902 10 12. 434

842 1. 3568 20 12. 435

921 1. o*±\JZ QO 19 A 9fl iz. 4^y

664 1 'iO^A 1. uZOi _

7 19 /I QQ LZ. 4oo

932 J.. £iKD&iO O

1 9 AO.A LZ. 4o4

10 9 0 1. 2190 3 12. 431

10-3-1 1. 1852 4 12. 431

10-4-0 19LZ. AIO 4o^

10-3-3 1 1 AAA 1 19 A Q

1

1Z. 4ol

10-4-2 1 1 34.ft 7 1 9 AQ 1 LZ. 4ol

119 1 1. 1073 9 12. 429

880 1. 0988 2 12. 432

11-3-2 1 07AO O 19 A QO 1Z. 4o4

120-0 i. uooy 19 /I Q

1

1Z. 4oJ

12-2-0 i 0990 O

11Z.9 AQQ *±oo

1. 0154 3 12. 436

12-2-2 1. 0084 9 12. 432

11-6-3 O QAAfi A4

19 A 9Q IZ. 4Jo

12-4-4 0

19 /1 9Q iz. 4zy

12-6-0 Q9fiJ. . vz\>*± lo 1 *> A OO iz. 4^y

lO'Oz

. 9214 5 12. 430

12-6-2 . 9163 5 12. 429

888 '. 8971 7 12! 430

14-2-0 . 8786 2 12. 426

14-3-1 . 8660 4 12. 430

12-80 . 8620 5 12. 432

14-4-0 . 8538 11 12. 431

14-4-2 . 8459 10 12. 432

15-2-1 . 8197 3 12. 431

14-60 . 8161 3 12. 431

15-3-2 . 8059 2 12. 433

12-100 . 7959 13 12. 432

14-6-4 . 7895 12 12. 433

Average value of last five lines 12. 432
Samarium Oxychloride, SmOCl (tetragonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of samarium oxychloride was prepared at NBS by heating at 900 °C

for 30 min a sample of samarium chloride from the

Lindsay Chemical Co., West Chicago, 111. Their

spectrographic analysis showed the following

impurities: a maximum as rare earth oxides of 0.1

percent (largely Nd, Gd, and Eu).

The sample was a very pale yellow-white.

The indices of refraction could not be determined

because the sample was too fine-grained.

The ^-values of the three strongest lines are: 2.569, 3.43, and 2.816 A.

Structural data. The structure of SmOCl has

not been determined; however, it is apparently

isostructural with PbFCl, with the space group

DIh-P4/nmm (No. 129) and 2 (SmOCl) per unit

cell.

Lattice constants

a c

A A

1961 National Bureau of Stand- 3. 982 6. 721

ards at 26 °C

The density of samarium oxychloride calculated

from the NBS lattice constants is 6.287 g/cm3 at

26 °C.

1961

National Bureau of

Standards

hkl Cu, 1.5405 A at 26 °C

d

A

001 6. 73 27

101 3! 43 91 nno uuz 3. 36 10

110 2. 816 78

111 2 595 13

102 2. 569 100

003 2. 239 8

1 io 1 2. 158 28

200 1. 9905 38

103 1. 9540 6

201 1. 9087 9

113 l! 7530 22

91 1 1. 7211 30

202 1. 7131 15

004 1. 6814 6

212 1. 5734 39

104 ll 5477 19

1. 4884 10

114 1. 4431 4

220 1. 4080 12

213 1 3948

221 l! 3781 4

UUO 1. 3439 5

301 1. 3023 6

222 1. 2994 5

204 1. 2836 4

105 l! 2742 8

1. 2592 10

311 1. 2383 10

302 1. 2346 12

214 1. 2221 10

115 L 2130 6

1. 1926 5

312 1. 1790 10

303 1. 1423 8

006 1. 1201 3

205 1. 1143 9

313 1. 0978 7

321 1. 0900 7

224, 106 1. 0794 5

215 1. 0726 7 322 1. 0494 10

304, 116 1. 0415 8

314 1. 0078 6

400 0. 9957 14

43
Silver Carbonate, Ag2C03 (monoclinic)

ASTM cards

Card

number

Index

lines Radiation Source

1-1071 2. 65

2. 73

2. 27

Molybdenum.

Hanawalt, Rinn, and

Frevel [1] 1938.

Additional published patterns. None.

NBS sample. The sample of silver carbonate

was prepared at NBS from solutions of silver

nitrate and potassium carbonate. Spectrographic

analysis showed the following impurities: 0.001

to 0.01 percent each of alumioum and silicoD, and

0.0001 to 0.001 percent each of calcium, copper,

iron, and magnesium.

The color of the sample was a greenish yellow.

The indices of refraction could not be determined

because the sample was too fine-grained.

The cZ-values of the three strongest lines are: 2.66, 2.74, and 2.27 A.

Structural data. Donohue and Helmbolz [2]

reported that Eldridge [3] in 1943 determined the

structure of silver carbonate, having the space

group Cf— P2j (No. 4) and 2 (Ag2C03 ) per unit

cell. The unit cell measurements reported by

Eldridge have been converted from kX to angstrom units for comparison with the NBS values

The density of silver carbonate calculated from

the NBS lattice constants is 6.131 g/cm3 at 25 °C.

References

[1] J. D. Hanawalt, H. W. Rinn, and L. K. Frevel, Chem.

ical analysis bv X-rav diffraction, Ind. Eng. ChemAnal. Ed. 10, 457-512 (1938)

[21 J. Donohue and L. Helmholz, The crystal structure of

potassium silver carbonate, KAgCC>3, J. Am. Chem.

Soc. 66, 295-298 (1944).

[3] J. E. Eldridge, Thesis, Dartmouth College (1943).

1961

National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

d

A

100 4. 85 15

020 4. 78 34

110 4. 32 32

120 3. 41 2

001 3. 25 3

011 3. 08 8

101 2. 74 60

130 2. 66 100

111 2. 56 6

200 2. 42 20

040 2. 39 11 121 2. 38 13

210 2. 35 8

121 2. 32 14

031 2. 27 36

220 2. 16 11 131 2. 04 10

201 1. 976 2

211 1. 934 6

230 1. 929 9

041 1. 912 4

201, 211 1. 875 6

141 1. 801 3

150 1. 777 13

240 1. 700 3

231 11 . fi7S \J 1 o q UOI A.. UO <J 10

9*31 11. fi9fi V4\) p.

1. OlD 1L mo HAH 1. 591 9

310 11. Oo^87t AT:

l to 1 L£i 1. ooo 9£t

1 fi^fl x. oou QO

9/1 1 Qo

100 1. 511 2 102 J., uu / Qo

QA1 oUl 1 . 4.RS TUO

oil 11. 4.^0 lOU 1i

1. 441 2

UOI 1 A OO 1. 4zs 1 321 1. 411 1 oil 1. 400 5

1 QO 104 1. 398 5

ZOl 1. 3747 7 202 1. 3723 7

132 1. 3654 3

260 1. 3299 4

222 1. 3192 <1

142 1. 3023 3

Lattice constants

1943

1961

Eldridge [2, 3] National Bureau of Standards

a b c 0

A

4. 84

4. 836

A

9. 54

9. 555

A

3. 24

3. 235

92.7°

92.64° at 25 °C

44
Silver Oxide, Ag20 (cubic)

ASTM cards

Card

number

Index

lines Radiation Source

1-1041 2. 72

2. 36

1. 67

Molybdenum, Hanawalt, Rinn,

and Frevel [1] 1938.

Additional published patterns. Wyckoff [2]

1922, Levi and Quilico [3] 1924, and P. Niggli [5]

1922.

NBS sample. The sample of silver oxide was

obtained from the Fisher Scientific Co., Washington, D. C. The sample was heated between 250

and 280 °C to sharpen the pattern. Spectrograph^ analysis showed the following impurities:

0.001 to 0.01 percent each of iron, magnesium,

lead, and silicon.

The sample was a very dark brown, opaque

powder.

The d-values of the three strongest lines are: 2.734, 2.367, and 1.674 A.

Structural data. Wyckoff [2] in 1922 determined that silver oxide has the cuprous oxide

structure-type, the space group Oh— Pn3m (No.

224) and 2(Ag2 0) per unit cell. Faivre [4] reported that the lattice constants

vary from 4.697 to 4.736 A, depending on the

amount of heat and the length of time applied.

Several unit cell measurements have been con- verted from kX to angstrom units for comparison

with the NBS value.

Lattice constants

A

1922 Wyckoff [2] 4. 778

1922 Niggli [5] 4. 728

1924 Levi and Quilico [3]. 4. 70-4. 78

1926 Goldschmidt [6] 4. 73

1944 Faivre [4] 4. 734 a 1961 National Bureau of Standards.. 4. 736 at 25 °C

» Constant for sample heated to 250 °C.

The density of silver oxide calculated from

NBS lattice constants is 7.243 g/cm3 at 25 °C.

1961

hkl National Bureau of Standards

Cu, 1.5405 A at 25 °C

d I a

A

110 3. 348 3 4. 735

111 2. 734 100 4. 735

200 2. 367 33 4. 734

220 1. 674 17 4. 734

311 1. 427 12 4. 734

222 1. 367 6 4. 734

400 1. 184 <! 4. 736

331 1. 086 3 4. 736

420 I. 059 2 4. 735

422 0. 9667 2 4. 736

511 . 9115 2 4. 736

Average value of last five lines. . - 4. 736

References

[1] J. D. Hanawalt, H. W. Rinn, and L. K. Frevel,

Chemical analysis by X-ray diffraction, Ind. Eng.

Chem. Anal. Ed. 10, 457-512 (1938).

[2] R. W. G. Wyckoff, The crystal structure of silver oxide (Ag2 0), Am. J. Sci. 3, 184-188 (1922).

[3] G. R. Levi and A. Quilico, Sulla non esistenza del

sottossido di argento, Gazz. chim. Ital. 54, 598-604

(1924).

[4] R. Faivre, Contribution a l'etude des oxydes aetifs et du probleme des sous-oxydes metalliques, Ann.

chim., XI 19, 58-101 (1944).

[5] P. Niggli, Die Kristallstruktur einiger Oxyde I, Z. Krist. 57, 253-299 (1922-1923).

[6] V. M. Goldschmidt, Geochemische Verteilungsgesetze

der Elemente; VII, Die Gesetze der Krystahochemie,

Skrifter Norske Videnskaps-Akad. Oslo I. Mat.-

Naturv. Kl. 1926, No. 2 (1926).

45
Sodium Molybdate, Na2Mo04 (cubic)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of sodium molybdate

was made at NBS by heating at 100 °C a sample

of sodium molybdate dihydrate obtained from the

Mallinckrodt Chemical Works, New York. Spectrographic analysis showed the presence of the

following impurities: 0.001 to 0.01 percent each

of aluminum and sodium.

The sample was colorless with the refractive

index 1.714.

The d-values of the three strongest lines are: 2.746, 3.220, and 5.26 A.

Structural data. According to Lindqvist [1],

sodium molybdate is isomorphous with sodium

tungstate, witb the spinel-type structure, the space

group OI-Fd3m (No. 227), and 8(Na2Mo04 ) per

unit cell.

Lattice constants

A

1950 Lindqvist [1] 8.99

1958 Becka and Poljak [2] 8.99

1961 National Bureau of Standards.. 9.108 at 25 °C

The density of sodium molybdate calculated

from the NBS lattice constants is 3.620 g/cm3 at 25 °C.

References

[1] I. Lindqvist, Crystal structure studies on anhydrous

sodium molybdates and tungstates, Acta Chem.

Scand. 4, 1066-1074 (1950).

[2] L. N. Becka and R. J. Poljak, Estructura cristalina del

Mo04 Na2 y del \VO4Na2, Anales asoc. quim. arg. 46,

204-209 (1958).

hkl

1961 National Bureau of Standards

Cu, 1.5405 A at 25 °C

a 1 a

A A

111 5. 26 63 9. 106

220 3. 220 87 9. 108

311 Z. /4o 100 9. 108

331 2. 090 7 9. 108

422 1. 8588 33 9. 106

511 1. 7533 33 9. 110

440 1. 6106 38 9. Ill

531 1 coat1. 5o91 \Z 9.n 1U5 me

620 1. 4403 14 9. 109

533 1. 3888 10 9. 107

711 1. 2756 6 9. 110

642 1. 2171 14 9. 108

731 1. lo57 18 9. IDs

800 1. 1386 5 9. 109

822 1. 0734 8 9. 108

751 1. 0519 8 9. 110

840 1. 0184 1 9. 109

911 0. 9999 4 9. 109

664 . 9709 4 9. 108

931 . 9549 4 9. 109

844 . 9295 7 9. 107

. 9154 2 9. 108

10-2-0 . 8930 8 9. 107

951 . 8805 6 9. 108

953 . 8494 3 9. 109

10-4-2 . 8315 7 9. 108

11-1-1 . 8213 5 9. 108

880 . 8051 3 9. 108

11-3-1 . 7957 . 4 9. 107

10-6-0 . 7810 4 9. 108

Average value of last five lines 9. 108

46
Sodium Tungstate, Na2W04 (cubic)

ASTM cards

Card

number

Index

lines Radiation Source

5-0247 5. 19

3. 18

2. 72

Copper Lindqvist [1] 1950.

Additional published patterns

Source Radiation

Becka and Poljak [2] „ Copper

NBS sample. The sample of sodium tungstate

was prepared at NBS by heating at 100 °C a sample of sodium tungstate dihydrate obtained

from the Allied Chemical and Dye Corp., New

York. Spectrographs analysis showed the pres- ence of the following impurities: 0.01 to 0.1 percent

of silicon; and 0.001 to 0.01 percent aluminum.

The sample was colorless with the refractive

index 1.679.

The ^-values of the three strongest lines are: 2.753, 3.23, and 5.28 A.

Structural data. Lindqvist [1] hi 1950 determined that sodium tungstate has spinel-type

structure, the space group (X-Fd3m (No. 227),

and 8(Na2 W04 ) per unit cell.

Lattice constants

A

1950 Lindqvist fl] 8.99

1958 Becka and Poljak [2] 9.11

1961 National Bureau of Standards-

9.1297

at 25

°C.

The density of sodium tungstate calculated from

the NBS lattice constant is 5.128 g/cm3 at 25 °C.

1961

National Bureau of Standards

hkl Cu, 1.5405 A at 25 °C

d I a

A A,,

111 5. 28 89 9. 15

220 3. 23 98 9. 14

oil 2. 753 100 9. 132

400 2. 282 5 9. 126

331 2. 094 20 9. 126

422 1. 8642 42 9. 133

511 1. 7574 38 9. 132

AACi 1. 6142 35 9. 131

531 1. 5430 20 9. 128

620 1. 4435 23 9. 130

533 1. 3921 14 9. 129

444 1. 3177 2 9. 129

/ 11 1. 2786 10 9. 131

642 1. 2202 19 9. 131

731 1. 1887 19 9. 131

800 1. 1412 6 9. 130

733 1. 1154 3 9. 130

899 1. 0759 10 9. 129

751 1. 0543 9 9. 130

840 1. 0206 3 9. 128

911 1. 0020 7 9. 129

664 0. 9732 5 9. 1297

yoi1

. 9571 5 9. 1299

844 . 9318 7 9. 1300

933 . 9176 4 9. 1298

10-2-0 . 8952 13 9. 1296

951 . 8826 7 9. 1301

953 . 8514 3 9. 1299

10-4-2 . 8334 8 9. 1298

11-1-1 . 8232 6 9. 1298

880 . 8069 3 9. 1295

11-3-1 . 7977 8 9. 1296

10-6-0 . 7829 9 9. 1296

Average value of last five lines 9. 1297

References

[1] I. Lindqvist, Crystal structure studies on anhydrous

sodium molybdates and tungstates, Acta Chem.

Scand. 4, 1066-1074 (1950).

[2] L. N. Becka and R. J. Poljak, Estructura cristalina

del Mo04 Na2 y del W04 Na2 , Anales asoc. qium. arg. 46, 204-209 (1958).

47
Thallium (I) Tungstate, T12W04 (hexagonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of thallium tungstate was prepared at NBS by reaction of solutions

of thallium (I) sulfate and sodium tungstate.

The slightly soluble precipitate was recrystallized

from a boiling aqueous solution and then fused at

approximately 700 °C. Spectrograph^ analysis

snowed the following impurities: 0.01 to 0.1

percent silicon, and 0.001 to 0.01 percent each of

arsenic and calcium.

The sample was light yellow. The indices of

refraction were not determined because they were

greater than 2.00.

The d-values of the three strongest lines are: 3.25, 3.14, and 2.260 A.

Structural data. No reference was found for

the structure of thallium tungstate; however, by

means of Bunn Charts, the pattern was tentatively

indexed with a hexagonal cell containing

2(T12 W04 ). Observed with an optical microscope,

thallium tungstate appears as hexagonal platelets.

Lattice constants

a c

A A

1961 National Bureau of Stand- 6.288 8.103 at

ards. 25 °C.

The density of thallium tungstate calculated

from the NBS lattice constants is 7.857 g/cm3 at

25 °C. The average density obtained with a Berman balance is 7.841 g/cm3 at 25 °C.

1961 National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

d I A

009 4. 05 1

1 09 3. 25 100

1 10 3. 14 83

003 2. 702 <1

103 2. 420 2

909 2. 260 48

004 2. 025 2

1. 899 29

91Aid9 1. 836 38

300 1. 816 22

114 1. 703 2

204 1. 625 14

990 1. 572 9

1 0^ 1. 553 1 214 1. 4437 18

312 1. 4152 12 006 1. 3503 2

106 1. 3109 1 402 1. 2904 4

116 1. 2405 !>9r,

314 1. 2108 5

^99 1. 1938 5

410 1 1 QQA 1. loot i 107 1. 1318 1 404 1. 1298 2

306 1. 0834 4

324 1. 0633 1 502 1. 0517 2

330 1. 0483 2

226 1. 0245 3

422 0. 9973 2

108 . 9958 2 512 . 9505 2 208 . 9494 2

424 . 9173 2

218 . 9090 2

48
Ytterbium Gallium Oxide 3:5, Yb3 Ga2 (Ga04)3 (cubic)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample was prepared at

NBS by S. Schneider from stoichiometric mixtures

of ytterbium oxide and gallium oxide. The

sample was pressed into pellets and heated at

1,350 °C for 6 hrs; then ground, remixed, and

again pressed into pellets and heated at 1,450 °C

for 6 hrs. Spectrograph^ analysis showed the

following impurities: 0.001 to 0.01 percent silicon

and 0.0001 to 0.001 percent each of erbium,

lutetium, and thulium.

The color of the sample was white. The index

of refraction could not be determined because the

sample was too fine-grained.

The ^-values of the three strongest lines are: 2.725, 2.489, and 1.6920 A.

Structural data. Keith and Roy [1] in 1954

showed that double oxides of trivalent elements

in these proportions may have the garnettype structure. Ytterbium gallium oxide is isostructural with garnet, having the space group

O1,?— Ia3d (No. 230) with 8[Yb3Ga2 (Ga04) 3] per

unit cell.

J. 7^7 hKl

1961 National Bureau of Standards

Cu, 1.5405 A at 25 °C

d I a

A A

211 4. 973 21 12. 18

220 4. 310 6 12. 19

321 3. 260 12 12. 20

400 3. 046 30 12. 18

420 2. 725 100 12. 19

422 2. 489 45 12. 19

431 2. 392 2 12. 20

521 2. 228 12 12. 20

440 2. 156 3 12. 20

611 1. 979 12 12. 199

620 1. 930 1 12. 206

631 1. 799 2 12. 201

444 1. 7609 16 12. 200

640 1. 6920 34 12. 201

721 1. 6603 5 12. 201

642 1. 6307 34 12. 203

732 I. 5494 3 12. 200

800 1. 5253 14 12. 202

653 1. 4582 2 12. 200

822 1. 4377 2 12. 199

752 1, 3816 2 12. 202

840 1. 3642 8 12. 202

842 1. 3311 18 12. 200

921 1. 3155 2 12. 199

664 1. 3006 6 12. 201

932 1. 2584 2 12. 201

941 1. 2326 1 12. 202

10-1-1 1. 2081 1 12. 201

10-20 1. 1965 2 12. 202

10-31 1. 1630 3 12. 198

Lattice constants

A

1961 National Bureau of Standards 12.200

at 25 °C

The density calculated from the NBS lattice

constant is 7.750 g/cm 3 at 25 °C.

Reference

[1] M. L. Keith and R. Roy, Structural relations among

double oxides of trivalent elements, Am. Mineralogist

39, Nos. 1 and 2, 1-23 (1954).

hkl

1961 National Bureau of Standards

Cu, 1.5405 A at 25 °C

d a

A

10-4-0 1. 1328 14 12. 201

10-3-3 1. 1229 2 12. 198

10-4-2 1. 1137 6 12. 200

11-2-1 1. 0869 3 12. 200

880 1. 0783 6 12. 200

11-3-2 1. 0539 <1 12. 200

10-6-0 1. 0460 <1 12. 198

965 1. 0238 1 12. 200

12-0-0 1. 0166 4 12. 199

12-2-0 1. 0028 4 12. 200

11-5-2 0. 9961 1 12. 200

12-2-2 . 9896 7 12. 200

11-6-1 . 9706 1 12. 200

11-6-3 . 9469 1 12. 200

13-2-1 . 9248 2 12. 199

12-4-4 . 9196 4 12. 199

12-6-0 . 9094 8 12. 200

13-3-2 . 9044 <1 12. 201

12-6-2 . 8994 5 12. 200

888 . 8805 3 12. 201

14-1-1 . 8671 <1 12. 201

14-2-0 . 8626 <1 12. 200

14-3-1 . 8500 2 12. 200

12-8-0 . 8460 2 12. 200

14-4-0 . 8380 8 12. 201

14-4-2 . 8302 8 12. 201

14-5-1 . 8188 1 12. 200

15-2-1 . 8045 2 12. 201

15-3-2 . 7908 <1 12. 200

Average value of last five lines 12. 200

49
Yttrium Gallium Oxide 3:5, Y3 Ga2 (Ga04 )3 (cubic)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample was prepared at

NBS by S. Schneider from stoichiometric mixtures

of yttrium oxide and gallium oxide. The sample

was pressed into pellets and heated at 1,350 °C

for 6 hr; then ground, remixed, and again pressed

into pellets and heated at 1,450 °C for 6 hr.

Spectrographic analysis showed the following impurities: 0.01 to 0.1 percent each of calcium and

silicon and 0.001 to 0.01 percent each of erbium,

molybdenum, potassium, terbium, and titanium.

The color of the sample was white. The index

of refraction could not be determined because the

sample was too fine-grained.

The d-values of the three strongest lines are: 2.744, 2.507, and 1.6404 A.

Structural data. Keith and Roy [1] in 1954

showed that double oxides of trivalent elements in

these proportions may have the garnet-type structure. Yttrium gallium oxide is isostructural with

garnet, having the space group Oi0 —Ia3d (No. 230)

with 8[Y3Ga2 (Ga04)3] per unit cell.

Lattice constants

A

1956 Bertaut and Forrat [2] 12. 30

1961 National Bureau of Standards-

_

12. 277 at 25 °C

« The density calculated from the NBS lattice

constant is 5.794 g/cm3 at 25 °C.

References

[1] M. L. Keith and R. Roy, Structural relations among

double oxides of trivalent elements, Am. Mineralogist 39 Nos. 1 and 2, 1-23 (1954).

[2] F. Bertaut and F. Forrat, Etude des combinaisons des

oxydes des terres rares avec l'alumine et la galline,

Compt. Rend. Acad. Sci. (Paris) 243, 1219-1222

(1956).

1961 National Bureau of Standards

Cu, 1.5405 A at 25 °C

hkl

d I a

A A

211 5. 009 4 12. 27

400 3. 070 40 12. 28

420 2. 744 100 12. 27

332 2. 617 4 12. 28

422 2. 507 51 12. 28

431 2. 407 5 12. 28

521 2. 242 6 12. 28

440 2. 170 2 12. 28

611 1. 991 6 12. 28

444 1. 772 13 12. 28

640 1. 702 34 12. 28

721 1. 670 2 12. 27

642 1. 6404 43 12. 276

800 1. 5349 16 12. 279

840 1. 3727 11 12. 278

842 1. 3393 18 12. 275

664 1. 3084 7 12. 274

851 1. 2937 1 12. 273

941 1. 2399 1 12. 274

10-1-1 1.2155 2 12. 276

10-2-0 1. 2035 2 12. 273

10-3-1 1. 1704 3 12. 275

10-4-0 1. 1399 15 12. 277

10-4-2 1. 1207 10 12. 277

11-2-1 1. 0935 2 12. 275

880 1. 0850 8 12. 275

12-00 1. 0229 5 12. 275

12-2-0 1. 0091 5 12. 276

12-2-2 0. 9956 10 12. 275

11-6-3 . 9527 2 12. 275

12-4-4 . 9254 5 12. 277

12-6-0 . 9149 12 12. 275

13-3-2 . 9100 1 12. 277

12-6-2 . 9050 6 12. 276

10-9-3 . 8904 1 12. 273

888 . 8859 6 12. 275

14-3-1 . 8553 2 12. 276

12-8-0 . 8513 4 12. 278

14-4-0 . 8431 11 12. 276

14-4-2 . 8354 14 12. 278

14-5-1 . 8239 1 12. 276

15-2-1 . 8095 2 12. 277

Average value of last five lines 12. 277
Yttrium Oxychloride, YOC1 (tetragonal)

ASTM cards. None.

Additional published patterns. None.

NBS sample. The sample of yttrium oxychloride was prepared at NBS by heating for 10

min at 700 °C a sample of YC13 obtained from

the Lindsay Chemical Co., West Chicago, 111. Their analysis showed the following impurities: a total as oxides of less than 0.1 percent of dysprosium, gadolinium, terbium, and europium, and

traces of other rare earths.

The sample was colorless. The indices of

refraction could not be determined because the

sample was too fine-grained.

The (i-values of the three strongest lines are: 2.520, 2.759, and 3.358 A.

Structural data. Zachariasen [1] in 1949 determined that yttrium oxychloride has PbFCltype structure, the space group D74h —P4/nmm

(No. 129) and 2(YOCl) per unit cell.

Lattice constants

a c

A A

1949 Zachariasen [1]__ 3. 900 6.604

1961 National Bureau of Stand- 3. 903 6.596 at

ards. 26 °C

The density of yttrium oxychloride calculated

from NBS lattice constants is 4.639 g/cm3 at

26 °C.

References

[1] W. H. Zachariasen, Crystal chemical studies of the

5f-series of elements. XII. New compounds repre- senting known structure types, Acta Crvst. 2, 388-390 (1949).

1961 National Bureau

of Standards

hkl Cu, 1.5405 A at 26 °C

d

A

6. 59 26

101 3. 358 50

002 3. 298 5 110 2. 759 73

102 2. 520 100

00^ uuo 2. 198 3 112 2. 116 20

200 1. 9505 40

103 1. 9148 3

201 1. 8703 6

no 1. 7196 16

211 1. 6868 17

202 1. 6783 2 004 1. 6488 5 212 1. 5426 37

1 04- 1. 5187 10

203 1. 4592 6

114 1. 4158 8

220 1. 3799 11 213 1. 3660

221 1. 3515 4

005 1. 3198 1 301 1. 2766 3 222 1. 2734 3

204 1. 2597 3

±\JO 1. 2490 4

310 1. 2342 8

311 1. 2135 2

302 1. 2102 5 214 1. 1984 7

1 1 ^ 1. 1903 3

223 1. 1694 3

312 1. 1562 3

006 1 0996 5 205 L 0925 5

"31 3 1. 0761 4

321 1. 0681 5

224, 106 1. 0584 2

215 1. 0525 2 322 1. 0284 6

304, 116 1. 0214 4

314 0. 9881 4

400 . 9757 3

Zirconium Iodate, Zr(I03 ) 4 (tetragonal)

ASTM cards. None.

NBS sample. The sample of zirconium iodate

was contributed by Don T. Cromer, Los Alamos

Scientific Laboratory, Los Alamos, N. Mex.

The compound was prepared by mixing water

solutions of stoichiometric quantities of sodium

iodate and zirconium sulfate tetrahydrate. The

precipitate was dried at approximately 180 °C.

It was refluxed in concentrated nitric acid to encourage crystallization. Their chemical analysis

showed 11.66 percent Zr(—Hi) and 64.0 percent

I. The source Zr(S04 ) 2 -4H20 contained 0.36 atom

percent Hf in the Zr (by spectrograph^ analysis).

The sample was colorless. The indices of re- fraction are higher than available immersion

liquids.

The ^-values of the three strongest lines are: 4.18, 2.784, and 2.963 A.

51
Zirconium Iodate, Zr(I03 ) 4 (tetragonal)—Continued

1961

National Bureau

hkl of Standards

Cu. 1.5405 A at 25 °C

d /

A

110 ^ Q9 90

111 4. 64 18

200 4. 18 100

002 3. 729 33

201 3. 651 22

102 °.o. 40fi wu 1

0

211 3. 349 15

112 3. 157 3

220 2. 963 55

202 2. 784 94

212 9 fi44 \

301 2. 616 15

311 2. 497 6

003 2. 489 4

222 2. 319 32

113 9 9Q'i 1 321 2. 219 9

312 2. 159 11 203 2. 137 5 400 2. 094 25

213 9 071 ao 401 2. 020 <1

322 1. 972 4

411 1. 960 14

331 1. 908 3

223 1. 904 8

420 1. 873 12 004 1. 864 8

402 1. 826 16

421 1. 817 4

412 1. 784 2

332 1. 746 <1

204 1. 703 22

323 1. 698

422 1. 674]

37

91Alt4 1. 67lj

510 1. 643 2

501 1. 635 13

403 1. 602 6

224 1. 578 5

Structural data. Larson and Cromer [1] in

1959 determined that zirconium iodate has the

space group C

34h -P4/n (No. 85) with 2[Zr(I03) 4] per unit cell. Lattice constants

1961

National Bureau

of Standards

hkl Cu, 1.5405 A at 25 °C

d I

41 °. JLO i. O ( O 1 °. 304 1. 551 4

502 1. 527\ 1 9 521 1. 523/

512 1. 5040 2

423 1 4QRA 9

005 1. 4925 4

440 1. 4815 7 205 1. 4063 7 600 1. 3968 11

OUO 1-L. 3Q09 Ou\J£i 7

442 1. 3772 4

414 1. 3740 4

611 1. 3551 5 225 1. 3328 3

620 1 ^59 ^9 1

0

424 1. 3224 10

523 1. 3191 5

305 1. 3160 2 602 1. 3084 3

^.41 1 98Q C! c. o 443 1. 2728 1 622 1. 2489 4

504 1. 2464 4

006 1. 2432 2

631 1 9^9?. •xo 116 1. 2170 <1

405 1. 2156 <1

613 1. 2051 1 415 1. 2026 <1

^94 1 1 Q4R 1' J. 206 1. 1919 1 710 1. 1852 1 701 1. 1820 <1

623 1. 1692 1

425 1. 1675 2 444 1 1 CAT 1. 1597 7 543 1. 1586 4

226 1. 1469 3

721 1. 1378 3

712 1. 1299 1 GOO boo 1. 1165 2

505 1. 1142 2 642 1. 1094 3

730 1. 1005 2

a c

A A

1959 Larson and Cromer [1] 8. 38 7. 49

1961 National Bureau of Stand- 8. 380 7. 460

ards. at 25

°C

The density of zirconium iodate calculated from

the NBS lattice constants is 5.012 g/cm3 at 25 °C.

References

[1] A. C. Larson and Don T. Cromer, The crystal structure

of Zr(I03 ) 4 , Acta Cryst. 14, 128-132(1961). (Presented at ACA meeting, Cornell University, Ithaca,

N.Y.) (1959).

52
CUMULATIVE INDEX TO CIRCULAR 539, VOLUMES 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, AND

MONOGRAPH 25, SECTION 1

5

Vol. or

sec. Aluminum, Al 1 Aluminum antimony, AlSb 4

Aluminum calcium sulfate hydrate (ettringite), Al2 03 -6CaO-3S03 -31H2 0 8

Aluminum chloride hexahvdrate (chloraluminite), A1C13 -6H2 0_..." 7

Aluminum fluosilicate, topaz, Al2 Si04 (F, OH) 2 ----- lm

Aluminum orthophosphate (berlinite),

A1P04 10

Aluminum orthophosphate, AIPO4 (orthorhombic) 10

Aluminum oxide, alpha (corundum) , a-Al2 03 - 9

Aluminum oxide monohydrate, alpha (bohmite), A12 03 -H2 0 _,- 3

Aluminum oxide monohydrate, beta (diaspore), A12 03 -H2 0 3

Ammonium aluminum sulfate dodecahydrate, NH4 A1(S04 ) 2 -12H2 0 6

Ammonium azide, NH4 N3 9

Ammonium bicarbonate (teschemacherite)

,

(NH4 )HC03 9

Ammonium bomide, NH4 Br 2 Ammonium bromoosmate, (NH4)OsBr9 3

Ammonium bromoplatinate, (NH4 ) 2 PtBr6 — 9

Ammonium bromoselenate, (NH4 ) 2 SeBr6 8

Ammonium bromotellurate, (NH4 ) 2 TeBr6 — 8

Ammonium chloride (sal-ammoniac)

,

NH4 C1 1 Ammonium chloroiridate (NH4 ) 2 IrCl6 8

Ammonium chloroosmate, (NH4 ) 2 0sCle lm

Ammonium chloropalladate, (NH4) 2 PdCl6— 8

Ammonium chloropalladite, (NH4 ) 2 PdCl4 — 6

Ammonium chloroplatinate, (NH t ) 2 PtCl6 — 5 Ammonium chlorostannate (NH4) 2 SnCl6 5 Ammonium chlortellurate, (NH4 ) 2TeCl6 8

Ammonium chromium sulfate dodecahydrate, NH4 Cr(S04 ) 2 -12H2 0 6

Ammonium dihydrogen phosphate,

NH4 H2 P04 4

Ammonium fluogermanate, (NH4) 2 GeF6 - — 6

Ammonium fluosilicate (cryptohalite)

,

(NH4) 2 SiF6 5 Ammonium gallium sulfate dodecahydrate,

NH4 Ga(S04) 2 -12H2 0 6

Ammonium iodide, NH4 I 4

Ammonium iron sulfate dodecahydrate,

NH4 Fe(S04) 2 -12H2 0 6

Ammonium metavanadate, NH4 V03 8

Ammonium nitrate (ammonia-niter)

,

NH4 N03 7 Ammonium oxalate monohydrate (oxammite), (NH4 ) 2 C2 04 -H2 0 7

Ammonium perchlorate, NH4 C104 , (orthorhombic) 7 Ammonium perrhenate, NH4 Re04 9

Ammonium phosphomolybdate tetrahydrate,

(NH4 ) 3 P04 (Mo03) I2 -4H2 0 8

Ammonium sulfate (mascagnite)

,

(NH4 ) 2 S04 (revised) 9

Ammonium zirconium fluoride (NH4 ) 3 ZrF7__ 6

Antimony, Sb , 3

Antimony (III) iodide, Sbl3 6

Antimony (III) oxide (senarmontite) , Sb2 03 _ 3

Antimony (III) oxide, valentinite, Sb2 03 10

Antimony (IV) oxide (cervantite) , Sb2 04 10

Antimony (V) oxide, Sb2 05 10

Antimony (III) sulfide (stibnite), Sb2 S3 5

Page1172

4

3

4

3

38

41

3

4

549

71

6

4

5

59

6

6

7

6

3

4

7

64

9

56

10

9

4

5

6

7

10

14

14

16

31

6

8

10

6

s Further work on this program is in progress, and it is anticipated that

additional volumes will be issued. Therefore, the accumulative index here

is not necessarily the concluding index for the project. m—Monograph 25.

Vol. or

sec. Page

Arsenic, As 3 6

Arsenic(III) iodide, Asl3 6 17

Arsenic trioxide (arsenolite) , As2 03 1 51

Barium, Ba 4 7

Barium carbonate (witherite), BaC03 2 54

Barium carbonate, BaC03 (cubic) 10 11

Baroum fluoride, BaF2 1 70

Barium molybdate, BaMo04 7 7

Barium nitrate (nitrobarite) , Ba(N03) 2 1 81

Barium peroxide, Ba02 6 18

Barium sulfate (barite), BaS04 3 65

Barium sulfide, BaS 7 8

Barium titanate, BaTi03 3 45

Barium tungstate, BaW04 7 9

Barium zirconate, BaZr03 5 8

Beryllium aluminum oxide (chrysoberyl)

,

BeAl2 04 9 10

Beryllium aluminum silicate (beryl)

Be3 Al2 (Si03) 6 9 13

Beryllium chromium oxide, BeCr2 04 10 12

Beryllium germanate, Be2 Ge04 10 13

Beryllium orthosilicate (phenacite), Be2 Si04 . 8 11 Beryllium oxide (bromellite) , BeO 1 36

Bismuth, Bi 3 20

Bismuth fluoride, BiF3 lm 7

Bismuth(III) iodide, Bil3 6 20

Bismuth oxybromide, BiOBr 8 14

Bismuth oxychloride (bismoclite), BiOCl 4 54

Bismuth oxyiodide, BiOI 9 16

Bismuth sulfide (bismuthinite) , Bi2 S3 4 23

Cadmium, Cd 3 10

Cadmium bromide, CdBr2 9 17

Cadmium carbonate (otavite), CdC03 7 11 Cadmium chloride, CdCl2 9 18

Cadmium molybdate, CdMo04 6 21

Cadmium oxide, CdO 2 27

Cadmium selenide, CdSe, (hexagonal) 7 12

Cadmium sulfide (greenockite) , CdS 4 15

tri-Calcium aluminate, 3CaOAl2 03 5 10

Calcium aluminate 12:7, 12CaO-7Al2 03 9 20

Calcium aluminum germanate, Ca3 Al2 (Ge04) 3 10 15

Calcium bromide hexahydrate, CaBr2 -6H2 0. 8 15

Calcium carbonate (aragonite), CaC03 3 53

Calcium carbonate (calcite) CaC03 2 51

Calcium chromate, CaCr04 7 13

Calcium chromium germanate, Ca3 Cr2 (Ge04) 3 - —- 10 16

Calcium chromium silicate (uvarovite),

Ca3 Cr2 (Si04) 3 10 17

Calcium fluoride (fluorite) , CaF2 1 69

Calcium formate, Ca(HC02) 2 8 16

Calcium gallium germanate, Ca3 Ga2 (Ge04) 3 - 10 18

Calcium hydroxide (portlandite) , Ca(OH) 2 __ 1 58

Calcium iron germanate, Ca3 Fe2 (Ge04) 3 10 19

Calcium iron silicate (andradite),

Ca3 Fe2 Si3 012 9 22

Calcium molybdate (powellite), CaMo04 6 22

Calcium nitrate, Ca(N03) 2 7 14

Calcium oxide, CaO 1 43

Calcium sulfate (anhydrite), CaS04 4 65

Calcium sulfide (oldhamite), CaS 7 15

Calcium tungstate (scheelite), CaW04 6 23

Carbon (diamond), C 2 5 Cerium(III) chloride, CeCl3 lm 8

Cerium (III) fluoride, CeF3 8 17

Cerium magnesium nitrate 24-hydrate,

Ce2 Mg3 (N03) I2 -24H2 0 10 20

Cerium (IV) oxide (cerianite) Ce02 1 56

Cerium(III) vanadate, CeV04 lm 9

Cesium aluminum sulfate dodecahydrate,

CsAl(S04 ) 2 -12H2 0 6 25

Cesium bromate, CsBr03 8 18

53
Vol. or

sec. Page

Cesium bomide, CsBr 3 49

Cesium bromoplatinate, Cs2 PtBr6 8 19

Cesium bromoselenate, Cs2 SeBr6 8 20

Cesium bromotellurate, Cs2TeBr6 9 24

Cesium chlorate, CsC103 8 20

Cesium chloride, CsCl 2 44

Cesium chloroplatinate, Cs2 PtCl6 5 14

Cesium chlorostannate, Cs2 SnCl6 5 16

Cesium chromium sulfate dodecahydrate,

CsCr(S04 ) 2 -12H2 0 8 21

Cesium dichloroiodide, CsICl2 3 50

Cesium fluoborate, CsBF4 8 22

Cesium fluogermanate, Cs2 GeF6 5 17

Cesium fluoplatinate, Cs2 PtF6 6 27

Cesium fluosilicate, Cs2 SiF6 5 19

Cesium gallium sulfate dodecahydrate,

CsGa(S04 ) 2 -12H2 0 8 23

Cesium iodide, Csl 4 47

Cesium iron sulfate dodecahydrate,

CsFe(S04) 2 -12H2 0 6 28

Cesium nitrate, CsNC>3 9 25

Cesium perchlorate, CsC104 , (orthorhombic). lm 10

Cesium sulfate, Cs2 S04 7 17

Cesium vanadium sulfate dodecahydrate,

CsV(S04) 2 -12H2 0 lm 11 Chromium, Cr 5 20

Chromium orthophosphate, beta, 0-CrPO4 _- 9 26

Chromium(III) oxide, Cr2 03 5 22

Chromium silicide, Cr3 Si 6 29

Cobalt aluminum oxide, CoAl2 04 9 27

Cobalt arsenide (skutterudite) , CoAs3 10 21

Cobalt (II) carbonate (spherocobaltite)

,

CoC03 10 24

Cobalt diarsenide, CoAs2 10 26

Cobalt gallate, CoGa2 04 10 27

Cobalt germanate, Co2 Ge04 10 27

Cobalt iron arsenide (safflorite), CoFeAs4 10 28

Cobalt(II) oxide, CoO 9 28

Cobalt(II, III) oxide, Co3 04 9 29

Copper, Cu 1 10

Copper(I) bromide, CuBr 4 36

Copper carbonate, basic, (azurite), Cu3 (OH) 2 (C03) 2 10 30

Copper carbonate, basic, (malachite),

Cu2 (OH) 2 (C03) 10 31

Copper (I) chloride (nantokite), CuCl 4 35

Copper (I) iodide (marshite), Cul 4 38

Copper (I) oxide (cuprite), Cu2 0 2 23

Copper (II) oxide (tenorite), CuO 1 49

Copper (II) sulfide (covellite), CuS 4 13

Dysprosium sesquioxode, Dy2 03 9 30

Erbium gallium oxide 3:5, Er3 Ga2 (Ga04 ) 3 lm 12

Erbium phosphate, ErP04 9 31

Erbium sesquioxide, Er2 03 8 25

Europium(III) chloride, EuCl3 lm 13

Europium oxychloride, EuOCl lm 13

Gadolinium fluoride, GdF3 lm 14

Gadolinium oxide, Gd2 03 lm 16

Gadolinium oxychloride, GdOCl lm 17

Gallium, Ga 2 9

Gallium antimonide, GaSb 6 30

Gallium oxide, alpha, Ga2 03 4 25

Gallium phosphate, (a-quartz type) GaP04 _. 8 27

Germanium, Ge 1 18

Germanium dioxide, Ge02 (hexagonal) 1 51

Germanium dioxide, Ge02 (tetragonal) 8 28

Germanium(IV) iodide, Gel4 5 25

Gold, Au 1 33

Gold antimony 1:2 (aurostibite) , AuSb2 7 18

Gold(I) cyanide, AuCN 10 33

Gold tin 1:1 AuSn 7 19

Hafnium, Hf 3 18

Holmium ethylsulfate nonahydrate,

Ho[(C2H5)S04 ] 3 -9H2 0 lm 18

Holmium sesquioxide, Ho2 03 9 32

m—Monograph 25.

Vol. or

sec. Page

Indium, In 3 12

Indium antimony, InSb 4 73

Indium oxide, ln2 03 5 26

Indium phosphate, InP04 8 29

Iodic acid, HI03 5 28

Iodine, I2 3 iq

Iridium, Ir 4 9

Iron, Alpha, Fe 4 3

Iron arsenide, FeAs lm 19

Iron arsenide (loellingite) , FeAs2 10 34

Iron sulfide (pyrite), FeS2 5 29

Lanthanum borate, LaB03 lm 20

Lanthanum chloride, LaCl3 lm 21

Lanthanum fluoride, LaF3 7 21

Lanthanum magnesium nitrate 24-hydrate,

La2 Mg3 (N03)12.24H2 0 lm 22

Lanthanum oxide, La2 03 3 33

Lahthanum oxychloride, LaOCl 7 22

Lead, Pb 1 34

Lead bromide, PbBr2 2 47

Lead carbonate (cerrussite) , PbC03 2 56

Lead chloride (cotunnite), PbCl2 2 45

Lead formate, Pb(HC02) 2 8 30

Lead fluochloride (matlockite) PbFCl 1 76

Lead fluoride, alpha, PbF2 5 31

Lead fluoride, beta, PbF2 5 33

Lead(II), iodide, Pbl2 5 34

Lead molybdate (wulfenite), PbMo04 7 23

Lead monoxide (litharge) , PbO (red) 2 30

Lead monoxide (massicot) PbO (yellow) 2 32

Lead nitrate, Pb(N03) 2 5 36

Lead(II, III) oxide (minium), Pb3 04 8 32

Lead, phosphate hydrate (lead hvdroxyapatite), Pb5 (P04 ) 3 OH 8 33

Lead selenide (clausthalite) , PbSe 5 38

Lead sulfate (anglesite), PbS04 3 67

Lead sulfide (galena) , PbS 2 18

Lead titanate, PbTi03 5 39

Lead tungstate (stolzite), PbW04 7 24

Lithium bromide, LiBr 4 30

Lithium chloride, LiCl 1 62

Lithium fluoride, LiF 1 61

Lithium iodate, LiI03 7 26

Lithium molybdate, Li2 Mo04 , (trigonal) lm 23

Lithium oxide, Li2 0 lm 25

Lithium nitrate, LiN03 7 27

Lithium perchlorate trihydrate, LiC104 -3H2 0 8 34

Lithium tungstate, Li2 W04 , (trigonal) lm 25

Lutetium oxide, Lu2 03 lm 27

Magnesium, Mg 1 10

Magnesium aluminate (spinel), MgAl2 04 2 35

Magnesium aluminum silicate (low-cordierite), Mg2 Al4 Si5 0i8 (orthorhombic) lm 28

Magnesium aluminum silicate (high-cordierite), Mg2 Al 4 Si5018 (hexagonal) lm 29

Magnesium carbonate (magnesite), MgC03 . 7 28

Magnesium chromite (picroehromite)

,

MgCr2 04 9 34

Magnesium fluoride (sellaite) , MgF2 4 33

Magnesium gallate, MgGa2 04 10 36

Magnesium germanate, Mg2 Ge04 (cubic) 10- 37

Magnesium germanate, Mg2 Ge04 (orthorhombic) 10 38

Magnesium hydroxide (brucite), Mg(OH)2 -_ 6 30

Magnesium oxide (periclase), MgO 1 37

Magnesium silicate (enstatite) , MgSi03 6 32

Magnesium silicate (forsterite) , Mg2 Si04 1 83

Magnesium silicate fluoride (norbergite)

Mg2 Si04 -MgF2 10 39

Magnesium silicate fluoride (humite),

3Mg2 Si04 -MgF2 - lm 30

Magnesium sulfate heptahydrate (epsomite)

,

MgS04 H2 0 7 30

Magnesium sulfide, MgS 7 31

Magnesium tin, Mg2 Sn 5 41

Magnesium titanate (geikielite) , MgTi03 — 5 43
Vol. or

sec. Page

Magnesium tungstate, MgW04 1 84

Manganese aluminate (galaxite), MnAl2 04 __ 9 35

Manganese(II) carbonate (rhodochrosite)

,

MnC03 7 32

Manganese ferrite (jacobsite), MnFe2 04 9 36

Manganese(II)oxide (manganosite) , MnO-_ 5 45

Manganese(III) oxide (partridgeite) , Mn2 03 - 9 37

Manganese selenide, MnSe 10 41

Manganese sulfide, alpha (alabandite)

,

a-MnS 4 11

Mercury (I) bromide, Hg2 Br2 7 33

Mercury (I) chloride (calomel), Hg2 Cl2 1 72

Mercury (II) chloride, HgCl2 1 73

Mercury (II) cyanide, Hg(CN)2 6 35

Mercury (I) iodide, Hgl 4 49

Mercury (II) iodide, Hgl2 1 74

Mercury (II) oxide (montroydite) , HgO

(revised) 9 39

Mercury (II) selenide (tiemannite) , HgSe___ 7 35

Mercury (II) sulfide (cinnabar), HgS (hexagonal) 4 17

Mercury (II) sulfide (metacinnabar) , HgS

(cubic) 4 21

Neodymium borate, NdB03 lm 32

Neodymium chloride, NdCl3 lm 33

Neodymium ethylsulfate nonahydrate,

Nd[(C2 H5)S04] 3 -9H2 0 9 41

Neodymium fluoride, NdF3 8 36

Neodymium gallium oxide 3:5, Nd3 Ga2 - (Ga04) 3 lm 34

Neodymium oxide, Nd2 03 4 26

Neodymium oxychloride, NdOCl 8 37

Nickel, Ni 1 13

Nichel aluminate, NiAl2 04 9 42

Nickel arsenic 1:2 (rammelsbergite) NiAs2 __ 10 42

Nickel arsenic sulfide (gersdorffite) NiAsS_ . lm 35

Nickel (II) carbonate, NiC03 (trigonal) lm 36

Nickel ferrite (trevorite), NiFe2 04 10 44

Nickel fluosilicate hexahydrate, NiSiF6 -6H2 CL 8 38

Nickel gallate, NiGa2 04 10 45

Nickel germanate, Ni2 Ge04 9 43

Nickel (II) oxide (bunsenite), NiO 1 47

Nickel sulfate hexahydrate, NiS04 -6H2 0__- 7 36

Nickel sulfide, millerite, NiS lm 37

Niobium silicide, NbSi2 8 39

Osmium, Os 4 8

Palladium, Pd 1 21

Palladium oxide, PdO 4 27

Platinum, Pt 1 31

Potassium aluminum sulfate dodecahydrate,

KA1(S04 ) 2 -12H2 0 6 36

Potassium borohydride, KBH4 9 44

Potassium bromate, KBr03 7 38

Potassium bromide, KBr 1 66

Potassium bromoplatinate, K2 PtBr6 8 40

Potassium bromoselenate, K2 SeBr6 8 41

Potassium chloride (sylvite), KC1 1 65

Potassium chloroplatinate, K2 PtCl6 5 49

Potassium chlororuthenate (IV), K2 RuCl6 - _ 10 46

Potassium chlorostannate K2 SnCl6 6 38

Potassium chromium sulfate dodecahydrate,

KCr(S04) 2 -12H2 0 6 39

Potassium cobaltinitrite, K3 Co(N02 ) 6 9 45

Potassium cyanate, KCNO 7 39

Potassium cyanide, KCN 1 77

Potassium dihydrogen arsenate, KH2 As04 _ . lm 38

Potassium dihydrogen phosphate, KH2 P04 __ 3 69

Potassium fluogermanate, K2 GeF6 6 41

Potassium fluoplatinate, K2 PtF6 6 42

Potassium fluoride, KF 1 64

Potassium fluosilicate (hieratite) , K2 SiF6 5 50

Potassium fluotitanate, K2 TiF6 7 40

Potassium heptafluozirconate, K3 ZrF? 9 46

Potassium hydroxy - chlororuthenate,

K4 Ru2 Cl10 O-H2 O 10 47

Potassium iodide, KI 1 68

m—Monograph 25.

Vol. or

see. Page

Potassium metaperiodate, KI04 7 41

Potassium nitrate (niter), KN03 3 58

Potassium perchlorate, KC104 6 43

Potassium permanganate, KMn04 7 42

Potassium perrhenate, KReO.> 8 41

Potassium phosphomolybdate, tetrahydrate,

K3 P04 (Mo03 ) 12 -4H2 0 8 43

Potassium sulfate (arcanite), K2 S04 3 62

Potassium thiocyanate, KCNS 8 44

Potassium zinc fluoride, KZnF3 5 51

Praseodymium chloride, PrCl3 lm 39

Praseodymium fluoride, PrF3 5 52

Praseodymium oxychloride, PrOCl 9 47

Rhenium, Re 2 13

Rhodium, Rh 3 9

Rubidium aluminum sulfate dodecahydrate,

RbAl(S04) 2 -12H2 0 6 44

Rubidium bromate, RbBr03 8 45

Rubidium bromide, RbBr 7 43

Rubidium bromotellurate, Rb2 TeBr6 8 46

Rubidium chlorate, RbC103 8 47

Rubidium chloride, RbCl 4 41

Rubidium chloroplatinate, Rb2 PtCl6 5 53

Rubidium chlorostannate, Rb2 SnCl6 6 46

Rubidium chlorotellurate, Rb2 TeCl6 8 48

Rubidium chromium sulfate dodecahydrate,

RbCr(S04 ) 2 -12H2 0 6 47

Rubidium fluoplatinate, Rb2 PtF6 6 48

Rubidium fluosilicate, Rb2 SiF6 6 49

Rubidium iodide, Rbl 4 43

Rubidium sulfate, Rb2 S04 8 48

Ruthenium, Ru 4 5 Samarium chloride, SmCl3 lm 40

Samarium fluoride, SmF3 lm 41

Samarium gallium oxide 3:5, Sm3 Ga2- (Ga04 ) 3 lm 42

Samarium oxychloride, SmOCl lm 43

Scandium oxide, Sc2 03 3 27

Scandium phosphate, ScP04 8 50

Selenium, Se 5 54

Selenium dioxide (selenolite) , Se02 1 53

Silicon, Si 2 6

Silicon dioxide (alpha or low quartz), Si02 __ 3 24

Silicon dioxide (alpha or low cristobalite)

,

Si02 (Revised) 10 48

Silicon dioxide (beta or high crisobalite)

,

Si02 1 42

Silver, Ag 1 23

Silver arsenate, Ag3 As04 5 56

Silver bromate, AgBr03 5 57

Silver bromide (bromyrite), AgBr 4 46

Silver carbonate Ag2 C03 lm 44

Silver chlorate, AgC103 7 44

Silver chloride (cerargyrite) , AgCl 4 44

Silver iodide (iodyrite), Agl (hexagonal) 8 51

Silver iodide, gamma, 7-Agl (cubic) 9 48

Silver metaperiodate, AgI04 9 49

Silver molybdate, Ag2 Mo04 7 45

Silver nitrate, AgN03 5 59

Silver nitrite, AgN02 5 60

Silver oxide, Ag2 0 lm 45

Silver (II) oxynitrate, Ag7 08 N03 4 61

Silver perrhenate, AgRe04 8 53

Silver phosphate, Ag3 P04 5 62

Silver sulfate, Ag2 S04 7 46

Silver sulfide (argentite) , Ag2 S 10 51

Sodium acid fluoride, NaHF2 5 63

Sodium borohydride, NaBH4 9 51

Sodium bromate, NaBr03 5 65

Sodium bromide, NaBr 3 47

Sodium carbonate monohydrate (thermonatrite), Na2 C03 -H2 0 8 54

Sodium chlorate, NaC103 3 51

Sodium chloride (halite) , NaCl 2 41

Sodium cyanide, NaCN (cubic) 1 78

Sodium cyanide, NaCN (orthorhombic) 1 79

Sodium fluoride (villiaumite) , NaF 1 63

55
Vol. or

sec. Sodium iodate, NaI03 7 Sodium iodide, Nal 4

Sodium metaperiodate, NaIC>4 7 Sodium molybdate, Na2 Mo04 lm

Sodium nitrate (soda-niter), NaNC>3 6

Sodium nitrite, NaN02 4

Sodium perchlorate, NaC104 (orthorhombic) . 7 Sodium sulfate (thenardite), Na2 S04 2 Sodium sulfite, Na2 S03 3

Sodium tetrametaphosphate tetrahydrate,

a-Na4 P4 0i2 -4H2 0 (Monoclinic) 10

Sodium tungstate, Na2 W04 lm

Strontium bromide hexahydrate, SrBr2 -6H20_ 4

Strontium carbonate (strontianite) SrC03 3

Strontium chloride, SrCl2 4

Strontium chloride hexahydrate, SrCl2 -6H2 0_ 4

Strontium fluoride, SrF2 5 Strontium formate, Sr(CH02) 2 8

Strontium formate dihydrate, Sr(CH02) 2

- 2H2 0 orthorhombic 8

Strontium iodide hexahydrate, SrI2 -6H2 0 8

Strontium molybdate, SrMo04 7 Strontium nitrate, Sr(NOs) 2 1 Strontium oxide, SrO 5 Strontium peroxide, Sr02 6 Strontium sulfate (celestite), SrS04 2 Strontium sulfide, SrS 7 Strontium titanate, SrTi03 3

Strontium tungstate, SrWC>4 7 Strontium zirconate, SrZr03 9

Sulfamic acid, NH3 S03 7

Sulfur, S 9

Tantalum, Ta 1 Tantalum Silicide, TaSi2 8

Tellurium, Te 1 Tellurium (IV) oxide (paratellurite) Te02 (tetragonal) 7 Tellurium (IV) oxide, paratellurite, Te02 10

Tellurium (IV) oxide (tellurite), Te02 (orthorhombic) 9

Thallium aluminum sulfate dodecahvdrate,

T1A1(S04 ) 2 -12H2 0 6

Thallium (I) bromate, TlBr03 8

Thallium bromide, TIBr 7 Thallium (I) chlorate, T1C103 8

Thallium (I) chloride, T1C1 4

Thallium chloroplatinate, Tl2 PtCi6 5 Thallium chlorostannate, Tl2 SnCl6 6

Thallium chromium sulfate dodecahvdrate,

TlCr(S04) 2 -12H2 0 . 6

Thallium fluosilicate, Tl2 SiF6 6

Thallium gallium sulfate dodecahydrate,

TlGa(S04 ) 2 -12H2 0 6

Thallium (I) iodate, T1I03 8

Vol. or Page sec. Page

47 Thallium (I) iodide, Til, (orthorhombic) 4 53

31 Thallium(I) nitrate, T1N03 6 58

48 Thallium (III) oxide, T12 03 2 28

46 Thallium(I) phosphate, TI3PO4 7 58

50 Thallium (III) phosphate, T1P04 7 59

62 Thallium (I) sulfate, T1,S04 6 59

49 Thallium (I) thiocvanate, T1CNS 8 63

59 Thallium (I) tungstate, T12 W04 lm 48

60 Thorium oxide (thorianite) , Th02 1 57

Thulium sesquioxide, Tm2 03 9 58

52 Tin, alpha, Sn 2 12

47 Tin, beta, Sn 1 24

60 Tin (IV) iodide, Snl4 5 71

56 Tin (II) oxide, SnO 4 28

40 Tin (IV) oxide (cassiterite) , Sn02 1 54

58 Tin(II) telluride, SnTe 7 61

67 Titanium, Ti 3 1 55 Titanium dioxide (anatase), Ti02 1 46

Titanium dioxide (rutile), Ti02 1 44

56 Titanium(III) oxide, TiOi.515 9 59

58 Titanium silicide, Ti5 Si 3 8 64

50 Tungsten, W 1 28

80 Tungsten sulfide (tungstenite), WS2 ._- 8 65

68 Uranium dioxide, TJ02 2 33

52 Urea, CO(NH2) 2 7 61

61 Vanadium (V) oxide, V2 05 8 66

52 Ytterbium gallium oxide 3:5, Yb3 Ga2 (Ga04)3. lm 49

44 Yttrium gallium oxide 3:5, Y3 Ga2 (GaO,) 3 lm 50

53 Yttrium, oxide, Y2 03 3 28

51 Yttrium oxychloride, YOC1 lm 51

54 Yttrium phosphate (xenotime), YP04 8 67

54 Zinc, Zn 1 16

29 Zinc aluminate (gahnite), ZnAl2 04 2 38

59 Zinc borate, ZnB2 04 1 83

26 Zinc carbonate (smithsonite) , ZnC03 8 69

Zinc cyanide Zn(CN) 2 5 73

56 Zinc, fluoride, ZnF2 6 60

55 Zinc fluosilicate hexahydrate, ZnSiF6 -6H2 0._ 8 70

Zinc germanate, Zn2 Ge04 10 56

57 Zinc iodide, Znl2 9 60

Zinc orthosilicate (willemite), Zn2 Si04 7 62

53 Zinc oxide (zincite), ZnO 2 25

60 Zinc pvrosilicate hydrate (hemimorphite)

57 Zn4(OH) 2 Si2 07 -H2 0 2 62

61 Zinc selenide, ZnSe 3 23

51 Zinc sulfate (zinkosite), ZnS04 7 64

70 Zinc sulfate heptahydrate (goslarite), 54 ZnS04 -7H2 0 8 71

Zinc sulfide, alpha (wurtzite), ZnS 2 14

Zinc sulfide, beta (sphalerite), ZnS-._ 2 16

£*J Zirconium, alpha, Zr 2 11 °" Zirconium iodate, Zr(I03) 4 lm 51

Zirconium silicate (zircon), ZrSi04 4 68

57 Zirconium sulfate tetrahvdrate, Zr(S04) 2

- 62 4H2 0 7 66

m-Monograph 25.

56

ti S. GuVER N ME NT PRINTING OFFICE: 1962
THE NATIONAL BUREAU OF STANDARDS

The scope of activities of the National Bureau of Standards at its major laboratories in Washington, D.C., and

Boulder, Colorado, is suggested in the following listing of the divisions and sections eDgaged in technical work.

In general, each section carries out specialized research, development, and engineering in the field indicated by

its title. A brief description of the activities, and of the resultant publications, appears on the inside of the

front cover. WASHINGTON, D.C.

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Equipment. Nucleonic Instrumentation. Neutron Physics.

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Reference Materials. Applied Analytical Research.

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Systems. Applications Engineering.

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Physics.

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Instruments. Basic Instrumentation.

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Molecular Kinetics. Mass Spectrometry.

Office of Weights and Measures.

BOULDER, COLO.

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