Mineralogy Database

Arsenpolybasite Mineral Data

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General Arsenpolybasite Information

Help on Chemical  Formula: Chemical Formula: [Ag9CuS4] [(Ag,Cu)6(As,Sb)2S7]
Help on Composition: Composition: Molecular Weight = 2,074.59 gm
   Copper    12.25 %  Cu
   Silver    62.39 %  Ag
   Antimony   2.93 %  Sb
   Arsenic    5.42 %  As
   Sulfur    17.00 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Ag12Cu4As1.5Sb0.5S11
Help on Environment: Environment: Formed in silver-bearing hydrothermal veins of low to moderate temperature.
Help on IMA Status: IMA Status: Approved IMA 1963
Help on Locality: Locality: At the Neuer Morgenstern mine, Freiberg, Saxony, Germany. In Peru, at Quespisiza. From Creede, Mineral Co., Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the chemical composition and close relationship to polybasite.
Help on Name Pronunciation: Name Pronunciation: Arsenpolybasite + Pronunciation Say ARSENPOLYBASITE
Help on Synonym: Synonym: Pearceite-M2a2b2c - Suggested nomenclature from AmMin v92:918
  Pearceite-T2ac - Suggested nomenclature from AmMin v92:918

Arsenpolybasite Image

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Comments: Back, crystalline arsenpolybasite in quartz.
Location: Medenec, Severocesky, Moravia, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Arsenpolybasite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.734:1:1.5851
Help on Cell Dimensions: Cell Dimensions: a = 26.08, b = 15.04, c = 23.84, Z = 16; beta = 90° V = 9,351.08 Den(Calc)= 5.89
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3(1), 3.19(0.9), 2.88(0.8),

Physical Properties of Arsenpolybasite

Help on Cleavage: Cleavage: {???} Indistinct, {001} Distinct
Help on Color: Color: Black.
Help on Density: Density: 6.18 - 6.23, Average = 6.2
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Arsenpolybasite

Help on Optical Data: Optical Data: Biaxial (-), b=2.72, 2V(Meas)=22. Dispersion very strong.
Help on Pleochroism (y): Pleochroism (y): dark red.
Help on RL Pleochroism: RL Pleochroism: Weak.

Calculated Properties of Arsenpolybasite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.29 gm/cc
note: Specific Gravity of Arsenpolybasite =5.89 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0012751678
Boson Index = 0.9987248322
Help on Photoelectric: Photoelectric: PEArsenpolybasite = 178.68 barns/electron
U=PEArsenpolybasite x rElectron Density= 944.58 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arsenpolybasite is Not Radioactive

Arsenpolybasite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.01)where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.01.07)Polybasite group Arsenpolybasite [Ag9CuS4][(Ag,Cu)6(As,Sb)2S7] C 2/m 2/m Polybasite [Ag9CuS4][(Ag,Cu)6(Sb,As)2S7] C 2/m 2/m Selenopolybasite! [(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2] P 3m1 3m Cupropolybasite! [Cu6Sb2S7][Ag9CuS4] P 3m1 3 2/m
Help on  Strunz Class: 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 Arsenpolybasite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Arsenpolybasite :
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 Arsenpolybasite Specimen Label here :


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





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