Mineralogy Database

Schapbachite Mineral Data

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General Schapbachite Information

Help on Chemical  Formula: Chemical Formula: AgBiS2
Help on Composition: Composition: Molecular Weight = 392.22 gm
   Silver   22.00 %  Ag
   Bismuth  43.16 %  Bi
   Lead     18.49 %  Pb
   Sulfur   16.35 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Ag0.8Pb0.35Bi0.81S2
Help on Environment: Environment: Discredited 1989 as a mixture of matildite and galena. Revised as a mineral matching synthetic (cubic) AgBiS2 in 2004. Inclusions in quartz.
Help on IMA Status: IMA Status: Discredited IMA 1985 (Dana # Added)
Help on Locality: Locality: Original (discredited) locality at Schapbach, Baden. Silberbr�nnle Mine, Haigerach valley, Gengenbach, Schwarzwald (Black Forest), Baden-W�rttemberg, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the original (discredited) locality.
Help on Synonym: Synonym: ICSD 42584
  PDF 21-1178

Schapbachite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 5.703, Z = 2; V = 185.49 Den(Calc)= 7.02
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.853(1)(200), 2.014(0.8)(220), 3.29(0.8)(111),

Physical Properties of Schapbachite

Help on Cleavage: Cleavage: None
Help on Color: Color: Grayish black.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Schapbachite

Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Schapbachite in Air
λ R  ∑ R(λ) 
 470 nm   45.19   
 546 nm   44.73 
 589 nm   44.32 
 650 nm   43.94 
Calculated Relative Intensity Colors of Schapbachite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 200%

Calculated Properties of Schapbachite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.93 gm/cc
note: Specific Gravity of Schapbachite =7.02 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PESchapbachite =1,219.53 barns/electron
U=PESchapbachite x rElectron Density=7,226.14 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schapbachite is Not Radioactive

Schapbachite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.19)Dana Group Schapbachite? AgBiS2 F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 02.JA.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JA -Galena derivatives with little or no Pb
02.JA.15 Cuboargyrite! AgSbS F m3m 4/m 3 2/m
02.JA.15 Schapbachite! AgBiS2 F m3m 4/m 3 2/m

Other Schapbachite Information

Help on References: References: NAME( NJMM, 2004, p 425) PHYS. PROP.(NJMM, 2004, p 425) OPTIC PROP.(NJMM, 2004, p 425)
Help on See Also: See Also: Links to other databases for Schapbachite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 02.JA.15





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