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Betekhtinite Mineral Data

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General Betekhtinite Information

Help on Chemical  Formula: Chemical Formula: Cu10(Fe,Pb)S6
Help on Composition: Composition: Molecular Weight = 923.52 gm
   Iron     3.63 %  Fe
   Copper  68.81 %  Cu
   Lead     6.73 %  Pb
   Sulfur  20.83 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Cu10Fe2+0.6Pb0.3S6
Help on Environment: Environment: In veins cutting the black cupriferous shale at Mansfeld, Germany.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: Locality: From the Mansfeld Kupferschiefer, Eisleben, and at Waschenback, Odenwald, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Anatolii Gergievich Betekhtin (1897-119620, Russian mineralogist and economic geologist.
Help on Name Pronunciation: Name Pronunciation: Betekhtinite + Pronunciation Say BETEKHTINITE
Help on Synonym: Synonym: ICSD 26494
  PDF 25-1223
 

Betekhtinite Image

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  Betekhtinite

Comments: Black crystalline aggregate of betekhtinite with white calcite.
Location: Twin Pocket, Mine #57, Dzhezkazgan, Kazakhstan. Scale: 9.5 x 7.5 cm.
© Fabre Minerals

Betekhtinite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6466:1:0.1699
Help on Cell Dimensions: Cell Dimensions: a = 14.693, b = 22.72, c = 3.861, Z = 5; V = 1,288.90 Den(Calc)= 5.95
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: I mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.832(1), 2.93(0.9), 3.08(0.8),
 

Physical Properties of Betekhtinite

Help on Cleavage: Cleavage: {???} Distinct, {???} Distinct, {???} Distinct
Help on Color: Color: Brownish black.
Help on Density: Density: 5.96 - 6.05, Average = 6
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Betekhtinite

Help on RL Anisotrophism: RL Anisotrophism: Strong, distinctly colored.
Help on RL Color: RL Color: Bright cream parallel to elongation, stronger yellowish cream perpendicular.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Betekhtinite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   34.00   35.40 
   
 420 nm   33.70   34.60 
 440 nm   33.40   33.80 
 460 nm   33.20   33.30 
 480 nm   32.90   33.00 
 500 nm   32.80   32.60 
 520 nm   32.60   32.30 
 540 nm   32.50   32.10 
 560 nm   32.30   32.00 
 580 nm   32.00   31.80 
 600 nm   31.80   31.80 
 620 nm   31.60   31.90 
 640 nm   31.40   32.20 
 660 nm   31.40   32.40 
 680 nm   31.20   32.40 
 700 nm   31.20   32.40 
Calculated Relative Intensity Colors of Betekhtinite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270% 280%
R1                        
R2                        
 

Calculated Properties of Betekhtinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.49 gm/cc
note: Specific Gravity of Betekhtinite =5.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEBetekhtinite = 145.58 barns/electron
U=PEBetekhtinite x rElectron Density= 799.50 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Betekhtinite is Not Radioactive
 

Betekhtinite Classification

Help on  Dana Class: Dana Class: 02.16.08.01 (02)Sulfides - Including Selenides and Tellurides
  (02.16)with miscellaneous formulae
  (02.16.08)Dana Group
 
02.16.08.01 Betekhtinite Cu10(Fe,Pb)S6 I mmm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.BE.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)
  02.BE -With Pb(Bi)
 
02.BE.05 Betekhtinite Cu10(Fe,Pb)S6 I mmm 2/m 2/m 2/m
 

Other Betekhtinite 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 Betekhtinite :
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 - HyperPhysics
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Betekhtinite

Cu10(Fe,Pb)S6
Dana No: 02.16.08.01 Strunz No: 02.BE.05
Locality:

 

Notes:

 

 
   
 


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