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Kochkarite Mineral Data
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General Kochkarite Information
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 Chemical Formula: |
PbBi4Te7 |
| Composition: |
Molecular Weight = 1,936.32 gm |
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Bismuth 43.17 % Bi |
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Tellurium 46.13 % Te |
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Lead 10.70 % Pb |
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______ |
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100.00 % |
| Empirical Formula: |
PbBi4Te7 |
| IMA Status: |
Approved IMA 1989 |
| Locality: |
Kochkar deposit, Ural Mountains, Russia Link to MinDat.org Location Data. |
| Name Origin: |
Named after the locality. |
| Name Pronunciation: |
Kochkarite + Pronunciation  |
| Synonym: |
ICSD 30395 |
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PDF 44-1439 |
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Kochkarite Image |
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Images:
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Kochkarite
Comments: Bright silvery veinlets of kochkarite throughout matrix.
Location: Kochkar' Au deposit, Plast, Urals Region, Russia.
Scale: Overall: 2.5 x 2 x 1.5 cm.
© Tom Loomis / Dakota Matrix |
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Kochkarite Crystallography
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| Axial Ratios: |
a:c = 1:16.32472 |
| Cell Dimensions: |
a = 4.416, c = 72.09, Z = 3; V = 1,217.49 Den(Calc)= 7.92 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1 |
| X Ray Diffraction: |
By Intensity(I/Io): 3.228(1), 2.364(0.58), 2.005(0.33), |
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Physical Properties of Kochkarite
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| Cleavage: |
{???} Perfect |
| Color: |
Silver gray. |
| Density: |
7.89 |
| Diaphaneity: |
Opaque |
| Hardness: |
2-2.5 - Gypsum-Finger Nail |
| Luster: |
Metallic |
| Streak: |
lead gray |
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Calculated Properties of Kochkarite
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| Electron Density: |
Bulk Density (Electron Density)=6.36 gm/cc
note: Specific Gravity of Kochkarite =7.92 gm/cc.
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| Fermion Index: |
Fermion Index = 0.06
Boson Index = 0.94 |
| Photoelectric: |
PEKochkarite =1,245.01 barns/electron
U=PEKochkarite x rElectron Density=7,923.71 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kochkarite is Not Radioactive |
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Kochkarite Classification
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| Dana Class: |
02.06.03.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.06)where Am Bn Xp, with (m+n):p=4:3 |
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(02.06.03)Kochkarite Group |
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02.06.03.01 Kochkarite PbBi4Te7 P 3m1 3 2/m |
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02.06.03.02 Aleksite PbBi2Te2S2(?) P 3m1 3 2/m |
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02.06.03.03 Hedleyite Bi7Te3(?) R 3m 3 2/m |
| Strunz Class: |
02.GC.40b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.G - Sulfarsenites, sulfantimonites, sulfbismuthites |
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02.GC -Poly-sulfarsenites |
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02.GC.40b Kochkarite PbBi4Te7 P 3m1 3 2/m |
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Other Kochkarite Information
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| References: |
PHYS. PROP.(Am.Min.,Vol.76,p1434,1991) |
| See Also: |
Links to other databases for Kochkarite :
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 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Print or Cut-and-Paste your Kochkarite Specimen Label here :
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Kochkarite
PbBi4Te7
Dana No: 02.06.03.01 Strunz No: 02.GC.40b
Locality:
Notes:
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