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Betekhtinite Mineral Data
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General Betekhtinite Information
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 Chemical Formula: |
Cu10(Fe,Pb)S6 |
| Composition: |
Molecular Weight = 923.52 gm |
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Iron 3.63 % Fe |
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Copper 68.81 % Cu |
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Lead 6.73 % Pb |
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Sulfur 20.83 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu10Fe2+0.6Pb0.3S6 |
| Environment: |
In veins cutting the black cupriferous shale at Mansfeld, Germany. |
| IMA Status: |
Valid Species (Pre-IMA) 1955 |
| Locality: |
From the Mansfeld Kupferschiefer, Eisleben, and at Waschenback, Odenwald, Germany. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Anatolii Gergievich Betekhtin (1897-119620, Russian mineralogist and economic geologist. |
| Name Pronunciation: |
Betekhtinite + Pronunciation  |
| Synonym: |
ICSD 26494 |
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PDF 25-1223 |
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Betekhtinite Image |
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Images:
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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 |
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Betekhtinite Crystallography
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| Axial Ratios: |
a:b:c =0.6466:1:0.1699 |
| Cell Dimensions: |
a = 14.693, b = 22.72, c = 3.861, Z = 5; V = 1,288.90 Den(Calc)= 5.95 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: I mmm |
| X Ray Diffraction: |
By Intensity(I/Io): 1.832(1), 2.93(0.9), 3.08(0.8), |
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Physical Properties of Betekhtinite
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| Cleavage: |
{???} Distinct, {???} Distinct, {???} Distinct |
| Color: |
Brownish black. |
| Density: |
5.96 - 6.05, Average = 6 |
| Diaphaneity: |
Opaque |
| Habit: |
Acicular - Occurs as needle-like crystals. |
| Hardness: |
3 - Calcite |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Betekhtinite
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| RL Anisotrophism: |
Strong, distinctly colored. |
| RL Color: |
Bright cream parallel to elongation, stronger yellowish cream perpendicular. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Betekhtinite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
34.00 |
35.40 |
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| 420 nm |
33.70 |
34.60 |
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| 440 nm |
33.40 |
33.80 |
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| 460 nm |
33.20 |
33.30 |
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| 480 nm |
32.90 |
33.00 |
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| 500 nm |
32.80 |
32.60 |
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| 520 nm |
32.60 |
32.30 |
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| 540 nm |
32.50 |
32.10 |
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| 560 nm |
32.30 |
32.00 |
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| 580 nm |
32.00 |
31.80 |
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| 600 nm |
31.80 |
31.80 |
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| 620 nm |
31.60 |
31.90 |
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| 640 nm |
31.40 |
32.20 |
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| 660 nm |
31.40 |
32.40 |
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| 680 nm |
31.20 |
32.40 |
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| 700 nm |
31.20 |
32.40 |
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Calculated Relative Intensity Colors of Betekhtinite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
270% |
280% |
| R1 |
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| R2 |
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Calculated Properties of Betekhtinite
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| Electron Density: |
Bulk Density (Electron Density)=5.49 gm/cc
note: Specific Gravity of Betekhtinite =5.95 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEBetekhtinite = 145.58 barns/electron
U=PEBetekhtinite x rElectron Density= 799.50 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Betekhtinite is Not Radioactive |
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Betekhtinite Classification
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| Dana Class: |
02.16.08.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.16)with miscellaneous formulae |
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(02.16.08)Dana Group |
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02.16.08.01 Betekhtinite Cu10(Fe,Pb)S6 I mmm 2/m 2/m 2/m |
| Strunz Class: |
02.BE.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1) |
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02.BE -With Pb(Bi) |
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02.BE.05 Betekhtinite Cu10(Fe,Pb)S6 I mmm 2/m 2/m 2/m |
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Other Betekhtinite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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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