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: Discredited locality at Schapbach, Baden. Silberbrünnle Mine, Haigerach valley, Gengenbach, Schwarzwald (Black Forest), Baden-Württemberg, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the original (discredited) locality.
Help on Synonym: Synonym: Discredited
  ICSD 42584
  PDF 21-1178
 

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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 - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m
 

Physical Properties of Schapbachite

Help on Cleavage: Cleavage: None
Help on Color: Color: Grayish black.
Help on Diaphaniety: Diaphaniety: 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
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 200%
R                  
 

Calculated Properties of Schapbachite

Help on Electron Density: Electron Density:

relectron=5.93 gm/cc
note: rSchapbachite =7.02 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.04208
Boson Index = 0.95792
Help on Photoelectric: Photoelectric:

PESchapbachite =1,219.53 barns/electron
U=PESchapbachite x relectron=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: 3.7.19.1 (3)Sulfides - Sulfosalts
  (3.7)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.7.19)Dana Group
 
3.7.19.1 Schapbachite ? AgBiS2 F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: II/C.16-35 II - Sulfides and sulphosalts
  II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1
  II/C.16 - Miargyrite - Volynskite series
 
II/C.16-05 Cuboargyrite! AgSbS F m3m 4/m 3 2/m
 
II/C.16-10 Miargyrite AgSbS2 C 2/c 2/m
 
II/C.16-15 Baumstarkite! Ag3(Sb,As)2SbS6 P1 1
 
II/C.16-20 Aramayoite Ag3Sb2(Sb,Bi)S6 P1 1
 
II/C.16-30 Matildite AgBiS2 P 3m1 3 2/m
 
II/C.16-35 Schapbachite AgBiS2 F m3m 4/m 3 2/m
 
II/C.16-40 Bohdanowiczite AgBiSe2 P 3m1 3 2/m
 
II/C.16-50 Volynskite AgBiTe2 P 3m1 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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 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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Schapbachite

AgBiS2
Dana No: 3.7.19.1 Strunz No: II/C.16-35
Locality:

 

Notes:

 

 
   
 
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