Kochkarite Mineral Data + Say KOCHKARITE


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General Kochkarite Information

Help on Chemical  Formula: Chemical Formula: PbBi4Te7
Help on Composition: Composition: Molecular Weight = 1,936.32 gm
   Bismuth    43.17 %  Bi
   Tellurium  46.13 %  Te
   Lead       10.70 %  Pb
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: PbBi4Te7
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Kochkar deposit, Ural Mountains, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Synonym: Synonym: ICSD 30395
  PDF 44-1439
 

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Kochkarite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:16.32472
Help on Cell Dimensions: Cell Dimensions: a = 4.416, c = 72.09, Z = 3; V = 1,217.49 Den(Calc)= 7.92
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.228(1), 2.364(0.58), 2.005(0.33),
 

Physical Properties of Kochkarite

Help on Cleavage: Cleavage: [???] Perfect
Help on Color: Color: Silver gray.
Help on Density: Density: 7.89
Help on Diaphaniety: Diaphaniety: Opaque
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: lead gray
 

Calculated Properties of Kochkarite

Help on Electron Density: Electron Density:

relectron=6.36 gm/cc
note: rKochkarite =7.92 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.0605
Boson Index = 0.9395
Help on Photoelectric: Photoelectric:

PEKochkarite =1,245.01 barns/electron
U=PEKochkarite x relectron=7,923.71 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kochkarite is Not Radioactive

 

Kochkarite Classification

Help on  Dana Class: Dana Class: 2.6.3.1 (2)Sulfides - Including Selenides and Tellurides
  (2.6)where Am Bn Xp, with (m+n):p=4:3
  (2.6.3)Dana Group
 
2.6.3.1 Kochkarite PbBi4Te7 P 3m1 3 2/m
 
2.6.3.2 Aleksite PbBi2Te2S2(?) P 3m1 3 2/m
 
2.6.3.3 Hedleyite Bi7Te3(?) R 3m 3 2/m
Help on  Strunz Class: Strunz Class: II/D.12-10 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.12 - Tetradymite group, Poubaite - Rucklidgeite series
 
II/D.12-10 Kochkarite PbBi4Te7 P 3m1 3 2/m
 
II/D.12-20 Aleksite PbBi2Te2S2(?) P 3m1 3 2/m
 
II/D.12-30 Poubaite PbBi2Se2(Te,S)2 R 3m 3 2/m
 
II/D.12-40 Platynite? (Bi,Pb)3(Se,S)4 R 3m 3 2/m
 
II/D.12-50 Rucklidgeite (Bi,Pb)3Te4 R 3m 3 2/m
 
II/D.12-55 Saddlebackite! Pb2Bi2Te2S3 Unk Hex
 
II/D.12-60 Babkinite! Pb2Bi2(S,Se)3 P 3,P 3m Trig
 

Other Kochkarite Information

Help on References: References: PHYS. PROP.(Am.Min.,Vol.76,p1434,1991)
Help on See Also: See Also: Links to other databases for Kochkarite :
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 -École des Mines de Paris

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

Kochkarite

PbBi4Te7
Dana No: 2.6.3.1 Strunz No: II/D.12-10
Locality:

 

Notes:

 

 
   
 
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