Soucekite Mineral Data

Soucekite Mineral Data +

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General Soucekite Information

Chemical Formula:

PbCuBi(S,Se)3

Composition:

Molecular Weight = 632.20 gm

Copper 10.05 % Cu

Bismuth 33.06 % Bi

Lead 32.77 % Pb

Selenium 14.99 % Se

Sulfur 9.13 % S

______

100.00 %

Empirical Formula:

PbCuBiS_1.8Se_1.2

Environment:

In hydrothermal quartz-carbonate veins.

IMA Status:

Approved IMA 1979

Locality:

From Oldrichov, near Tachov, Czechoslovakia. Link to MinDat.org Location Data.

Name Origin:

Named for Frantisek Soucek, Department of Mineralogy, Charles University, Prague, Czechoslovakia.

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Soucekite Crystallography

Axial Ratios:

a:b:c =0.9594:1:0.9508

Cell Dimensions:

a = 8.153, b = 8.498, c = 8.08, Z = 4; V = 559.82 Den(Calc)= 7.50

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pn21m

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

By Intensity(I/I_o): 2.717(1), 2.757(1), 4.04(0.8),

Physical Properties of Soucekite

Color:

Lead gray.

Density:

7.6

Diaphaniety:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

4 - Fluorite

Luster:

Metallic

Optical Properties of Soucekite

RL Anisotrophism:

Medium strong, in light brown to dark blue-gray.

RL Color:

Creamy white with a brownish tint.

RL Pleochroism:

Distinct in oil, in creamy brown to light gray with a bluish tint.

Calculated Properties of Soucekite

Electron Density:

r_electron=6.25 gm/cc
note: r_Soucekite=7.50 gm/cc.

Fermion Index

Fermion Index = 0.0845
Boson Index = 0.9155

Photoelectric:

PE_Soucekite=1,259.48 barns/electron
U=PE_Soucekite x r_electron=7,877.23 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Soucekite is Not Radioactive

Soucekite Classification

Dana Class:

3.4.3.3 (3)Sulfides - Sulfosalts

(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.4.3)Dana Group

3.4.3.1 Seligmannite PbCuAsS3 Pmmn 2/m 2/m 2/m

3.4.3.2 Bournonite PbCuSbS3 Pn21m 2/m 2/m 2/m

3.4.3.3 Soucekite PbCuBi(S,Se)3 Pn21m mm2

Strunz Class:

II/E.30-15 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.30 - Aikinite - Pekoite series

II/E.30-10 Aikinite PbCuBiS3 Pbnm 2/m 2/m 2/m

II/E.30-15 Soucekite PbCuBi(S,Se)3 Pn21m mm2

II/E.30-20 Friedrichite Pb5Cu5Bi7S18 Pb21m mm2

II/E.30-25 Emilite! Cu10.7Pb10.7Bi21.3S48 P mc2₁ mm2

II/E.30-30 Hammarite Pb2Cu2Bi4S9(?) Pbnm 2/m 2/m 2/m

II/E.30-40 Lindstromite Pb3Cu3Bi7S15 Pbnm 2/m 2/m 2/m

II/E.30-50 Krupkaite PbCuBi3S6 P mc2₁ mm2

II/E.30-54 Paarite! Cu1.7Pb1.7Bi6.3S12 Pmcn 2/m 2/m 2/m

II/E.30-60 Gladite PbCuBi5S9 P nma 2/m 2/m 2/m

II/E.30-70 Pekoite PbCuBi11(S,Se)18 P 2₁am mm2

Other Soucekite Information

References:

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

See Also:

Links to other databases for Soucekite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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

Soucekite

PbCuBi(S,Se)3
Dana No: 3.4.3.3 Strunz No: II/E.30-15
Locality:

Notes: