Ustarasite Mineral Data

Ustarasite Mineral Data +

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General Ustarasite Information

Chemical Formula:

Pb(Bi,Sb)6S10

Composition:

Molecular Weight = 1,738.13 gm

Bismuth 66.13 % Bi

Antimony 3.50 % Sb

Lead 11.92 % Pb

Sulfur 18.45 % S

______

100.00 %

Empirical Formula:

PbBi_5.5Sb_0.5S₁₀

Environment:

In quartz-bismuthinite veins.

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Ustarasaisk deposit, western Tian-Shan, Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

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Ustarasite Crystallography

Crystal System:

OrthorhombicSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.057(1), 1.483(1), 3.527(1),

Physical Properties of Ustarasite

Cleavage:

[???] Perfect

Color:

Gray, Silver gray.

Diaphaniety:

Opaque

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Optical Properties of Ustarasite

RL Anisotrophism:

Strong.

RL Color:

Pure white.

Calculated Properties of Ustarasite

Fermion Index

Fermion Index = 0.02772
Boson Index = 0.97228

Photoelectric:

PE_Ustarasite=1,510.60 barns/electron
U=PE_Ustarasite x r_electron= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ustarasite is Not Radioactive

Ustarasite Classification

Dana Class:

3.8.11.1 (3)Sulfides - Sulfosalts

(3.8)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.8.11)Dana Group

3.8.11.1 Ustarasite Pb(Bi,Sb)6S10 Unk Ortho

Strunz Class:

II/E.35-10 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts (Pb-Cu/Ag) with predominant Vismut x = 6.0 - 1.6

II/E.35 - Ustarasite series

II/E.35-10 Ustarasite Pb(Bi,Sb)6S10 Unk Ortho

Other Ustarasite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Ustarasite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Ustarasite Specimen Label here :

Ustarasite

Pb(Bi,Sb)6S10
Dana No: 3.8.11.1 Strunz No: II/E.35-10
Locality:

Notes: