Antimonpearceite Mineral Data

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General Antimonpearceite Information

Chemical Formula:

[Ag9CuS4] [(Ag,Cu)6(Sb,As)2S7]

Composition:

Molecular Weight = 2,121.41 gm

Copper 11.98 % Cu

Silver 61.02 % Ag

Antimony 8.61 % Sb

Arsenic 1.77 % As

Sulfur 16.63 % S

______

100.00 %

Empirical Formula:

Ag₁₂Cu₄Sb_1.5As_0.5S₁₁

Environment:

In epithermal precious metal veins.

IMA Status:

Approved IMA 1963

Locality:

In Mexico, from an unspecified locality in Sonora, and from Guanajuato. At Taltal, Chile. From the Clara mine, near Wolfrath, Black Forest, Germany. Link to MinDat.org Location Data.

Name Origin:

For its compositional relationship to pearceite.

Name Pronunciation:

Antimonpearceite + Pronunciation

Synonym:

Polybasite-Tac - Suggested nomenclature from AmMin v92:918

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Antimonpearceite Crystallography

Axial Ratios:

a:b:c =1.7297:1:1.6081

Cell Dimensions:

a = 12.8, b = 7.4, c = 11.9, Z = 2; beta = 90° V = 1,127.17 Den(Calc)= 6.25

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3(1), 2.84(0.9), 3.11(0.5),

Crystal Structure:

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Evain M , Bindi L , Menchetti S , Acta Crystallographica, Section B , 62 (2006) p.768-774, Structure and phase transition of the Se-rich variety of antimonpearceite,, [(Ag,Cu)6(Sb,As)2(S,Se)7]-[Ag9Cu(S,Se)2Se2], Locality: De Lamar mine, Idaho, USA, Sample: T = 120 K

Physical Properties of Antimonpearceite

Cleavage:

None

Color:

Black.

Density:

6.33 - 6.35, Average = 6.34

Diaphaneity:

Opaque

Hardness:

3 - Calcite

Luster:

Sub Metallic

Streak:

black

Calculated Properties of Antimonpearceite

Electron Density:

Bulk Density (Electron Density)=5.59 gm/cc
note: Specific Gravity of Antimonpearceite =6.25 gm/cc.

Fermion Index:

Fermion Index = 0.0012470196
Boson Index = 0.9987529804

Photoelectric:

PE_{Antimonpearceite}= 191.60 barns/electron
U=PE_{Antimonpearceite} x rElectron Density=1,071.40 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Antimonpearceite is Not Radioactive

Antimonpearceite Classification

Dana Class:

03.01.08.02 (03)Sulfides - Sulfosalts

(03.01)where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.01.08)Pearceite group

03.01.08.01 Pearceite [Ag9CuS4][(Ag,Cu)6(As,Sb)2S7] P 3m1 3 2/m

03.01.08.02 Antimonpearceite [Ag9CuS4][(Ag,Cu)6(Sb,As)2S7] C 2/m 2/m

03.01.08.03 Cupropearceite [Cu6As2S7][Ag9CuS4] P 3m1 3 2/m

Strunz Class:

02.GB.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.G - Sulfarsenites, sulfantimonites, sulfbismuthites

02.GB -Neso-sulfarsenites, etc

02.GB.15 Antimonpearceite [Ag9CuS4][(Ag,Cu)6(Sb,As)2S7] C 2/m 2/m

02.GB.15 Arsenpolybasite [Ag9CuS4][(Ag,Cu)6(As,Sb)2S7] C 2/m 2/m

02.GB.15 Polybasite [Ag9CuS4][(Ag,Cu)6(Sb,As)2S7] C 2/m 2/m

02.GB.15 Pearceite [Ag9CuS4][(Ag,Cu)6(As,Sb)2S7] P 3m1 3 2/m

02.GB.15 Cupropearceite [Cu6As2S7][Ag9CuS4] P 3m1 3 2/m

02.GB.15 Selenopolybasite! [(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2] P 3m1 3m

02.GB.15 Cupropolybasite! [Cu6Sb2S7][Ag9CuS4] P 3m1 3 2/m

Other Antimonpearceite Information

References:

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

See Also:

Links to other databases for Antimonpearceite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Antimonpearceite

[Ag9CuS4] [(Ag,Cu)6(Sb,As)2S7]
Dana No: 03.01.08.02 Strunz No: 02.GB.15
Locality:

Notes: