GalenaPbS
c 2001-2005 Mineral Data Publishing, version 1

Crystal Data: Cubic. Point Group: 4/m 3 2/m. Most commonly cubic, crystals to a meteron an edge are known; more rarely cubo-octahedral or octahedral. May be tabular on {001}; also
forms reticulated masses and skeletal crystals. As cleavable masses, coarse to very fine granular;
fibrous, plumose. Twinning: Twin plane {111}, as both contact and penetration twins; twin
plane {114}, lamellar.
Physical Properties:
Cleavage: Perfect on {001}; parting or cleavage on {111}.
Fracture: Subconchoidal. Tenacity: Brittle. Hardness = 2.5–2.75 VHN = 79–104 (100 g load).
D(meas.) = 7.58 D(calc.) = 7.57
Optical Properties: Opaque. Color: Lead-gray; in polished section, white. Streak: Lead-gray.
Luster: Metallic.
R: (400) 51.9, (420) 50.5, (440) 49.1, (460) 47.7, (480) 46.6, (500) 45.4, (520) 44.4, (540) 43.7,(560) 43.1, (580) 42.8, (600) 42.7, (620) 42.7, (640) 42.8, (660) 42.9, (680) 42.9, (700) 42.6
Cell Data:

Space Group: F m3m. a = 5.936Z=4

X-ray Powder Pattern: Synthetic.
2.969 (100), 3.429 (84), 2.099 (57), 1.790 (35), 1.327 (17), 1.714 (16), 1.484 (10)Chemistry:PbCuSb
BiS

(1)
86.50
0.07

13.31

(2)
85.9
trace
0.7
0.2
12.6

(3)
86.60

13.40

Total 99.88
99.4
100.00(1) Katanga Province, Congo (Shaba Province, Zaire); Cu assumed present in covellite and S
equivalent deducted. (2) Barrow mine, Newlands, Cumbria, England; by electron microprobe.
(3) PbS.
Polymorphism & Series:Forms a series with clausthalite.

Occurrence: In many different types of environments. In hydrothermal veins, formed under awide range of temperatures; in contact metamorphic deposits, in pegmatites, rarely; limestones
and dolostones are common host rocks.
Association: Sphalerite, marcasite, pyrite, chalcopyrite, tetrahedrite, silver minerals, siderite,calcite, dolomite, barite, quartz, many other hydrothermal minerals.
Distribution: The most important ore mineral of lead; only a few deposits of note can bementioned. In the USA, in Idaho, in the Coeur d’Alene district, Shoshone Co.; in Colorado, atLeadville, Lake Co., and from Breckenridge, Summit Co. In the Mississippi Valley region, in theTri-State district, at Joplin, Jasper Co., Missouri; Galena, Cherokee Co., Kansas; and Picher,Ottawa Co., Oklahoma. At the Miliken (Sweetwater) mine, Reynolds Co., Missouri, and othermines north along the Viburnum Trend district, brilliant crystals. From Přı́bram, Czech Republic.
At Freiberg, Saxony; from near Bad Ems, Hesse; and at St. Andreasberg, Neudorf, and Clausthal,in the Harz Mountains, Germany. In France, from Pontgibaud, Puy-de-Dôme. In England, atAlston Moor, Cumbria. In Scotland, at Wanlockhead, Dumfries. In Ireland, from the Mogul mine,Silvermines, Co. Tipperary. At Naica and Santa Eulalia, Chihuahua, Mexico.
Name:

A Latin word galena, given to lead ore or the dross from melted lead.

References: (1) Palache, C., H. Berman, and C. Frondel (1944) Dana’s system of mineralogy,(7th edition), v. I, 200–204. (2) Deer, W.A., R.A. Howie, and J. Zussman (1962) Rock-formingminerals, v. 5, non-silicates, 180–185. (3) Ramsdell, L.S. (1925) The crystal structures of somemetallic sulfides. Amer. Mineral., 10, 281–??. (4) (1953) NBS Circ. 539, 2, 18. (5) Ramdohr, P.
(1969) The ore minerals and their intergrowths, (3rd edition), 635–649. (6) Criddle, A.J. and C.J.
Stanley, Eds. (1993) Quantitative data file for ore minerals, 3rd ed. Chapman & Hall, London,
185.
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