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Tsumoite Mineral Data |
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Tsumoite Mineral Data |
General Tsumoite Information |
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 Chemical Formula: |
BiTe | ||
| Composition: |
Molecular Weight = 336.58 gm | ||
| Bismuth 62.09 % Bi | |||
| Tellurium 37.91 % Te | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
BiTe | ||
| Environment: |
As small irregular aggregates in skarns associated with pyrometasomatic Cu-Zn-Pb deposits. | ||
| IMA Status: |
Approved IMA 1978 | ||
| Locality: |
Tsumo mine, Hiroshima, Shimane prefecture, Honshu, Japan. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Name Pronunciation: |
Tsumoite  |
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| Synonym: |
ICSD 30525 | ||
| PDF 44-667 | |||
Tsumoite Image | |||
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Tsumoite Crystallography |
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| Axial Ratios: |
a:c = 1:5.43871 | ||
| Cell Dimensions: |
a = 4.422, c = 24.05, Z = 6; V = 407.27 Den(Calc)= 8.23 | ||
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.23(1), 2.36(0.6), 2.21(0.5), | ||
Physical Properties of Tsumoite |
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| Cleavage: |
{0001} Perfect | ||
| Color: |
Silver white. | ||
| Density: |
8.16 | ||
| Diaphaneity: |
Opaque | ||
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. | ||
| Habit: |
Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks. | ||
| Hardness: |
2.5-3 - Finger Nail-Calcite | ||
| Luster: |
Metallic | ||
| Streak: |
steel gray | ||
Optical Properties of Tsumoite |
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| RL Anisotrophism: |
Moderate. | ||
| RL Color: |
White with a creamy tint. | ||
| RL Pleochroism: |
Very weak. | ||
Calculated Properties of Tsumoite |
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| Electron Density: |
Bulk Density (Electron Density)=6.60 gm/cc note: Specific Gravity of Tsumoite =8.23 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.03 Boson Index = 0.97 |
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| Photoelectric: |
PETsumoite =1,390.51 barns/electron U=PETsumoite x rElectron Density=9,180.15 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tsumoite is Not Radioactive |
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Tsumoite Classification |
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| Dana Class: |
02.08.20.01 (02)Sulfides - Including Selenides and Tellurides | ||
| (02.08)where Am Bn Xp, with (m+n):p=1:1 | |||
| (02.08.20)Tsumoite Group (Trigonal: P-3m1) | |||
| Strunz Class: |
02.DC.05b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf | ||
| 02.D - Metal Sulfides, M:S = 3:4 and 2:3 | |||
| 02.DC -Variable M:S | |||
Other Tsumoite 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 Tsumoite : 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 15 - Scandinavian mineral gallery 16 - WWW-MINCRYST Search for Tsumoite using: Visit our Advertisers for Tsumoite : Ask about Tsumoite here : Print or Cut-and-Paste your Tsumoite Specimen Label here :
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