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General Omeiite Information |
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 Chemical Formula: |
(Os,Ru)As2 | ||
| Composition: |
Molecular Weight = 317.76 gm | ||
| Arsenic 47.16 % As | |||
| Osmium 44.89 % Os | |||
| Ruthenium 7.95 % Ru | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Os0.75Ru0.25As2 | ||
| Environment: |
Found in a Cu-Ni sulfide deposit associated with an ultramafic body. | ||
| IMA Status: |
Approved IMA 1978 | ||
| Locality: |
Danba, Omeishan Mt, Sichuan (Szechuan), China, Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Name Pronunciation: |
Omeiite  |
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| Synonym: |
ICSD 995 | ||
| PDF 34-336 | |||
Search for Omeiite Images | |||
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Images:
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Omeiite Crystallography |
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| Axial Ratios: |
a:b:c =0.8174:1:0.4565 | ||
| Cell Dimensions: |
a = 5.409, b = 6.617, c = 3.021, Z = 2; V = 108.13 Den(Calc)= 9.76 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 1.915(1), 2.63(1), 2.67(0.8), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Omeiite |
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| Cleavage: |
{???} Good | ||
| Color: |
Steel gray. | ||
| Density: |
11.2 | ||
| Diaphaneity: |
Opaque | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Hardness: |
7 - Quartz | ||
| Luster: |
Metallic | ||
Optical Properties of Omeiite |
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| RL Anisotrophism: |
Distinct. | ||
| RL Color: |
White with a yellow tint in air, milky yellow in oil. | ||
| RL Pleochroism: |
Weak, yellow to grayish yellow.. | ||
Calculated Properties of Omeiite |
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| Electron Density: |
Bulk Density (Electron Density)=8.23 gm/cc note: Specific Gravity of Omeiite =9.76 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.1 Boson Index = 0.9 |
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| Photoelectric: |
PEOmeiite = 680.53 barns/electron U=PEOmeiite x rElectron Density=5,601.83 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Omeiite is Not Radioactive |
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Omeiite Classification |
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| Dana Class: |
02.12.02.07 (02)Sulfides - Including Selenides and Tellurides | ||
| (02.12)where Am Bn Xp, with (m+n):p=1:2 | |||
| (02.12.02)Marcasite Group (Orthorhombic: Pnnm) | |||
| Strunz Class: |
02.EB.15a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf | ||
| 02.E - Metal Sulfides, M:S £ 1:2 | |||
| 02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc. | |||
Other Omeiite 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 Omeiite : 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 - WWW-MINCRYST Search for Omeiite using: Visit our Advertisers for Omeiite : A Bijoux Google Search for OmeiiteAdam's Minerals Google Search for Omeiite Cape Minerals Google Search for Omeiite Dakota Matrix Minerals Google Search for Omeiite Excalibur Mineral Corp. Google Search for Omeiite Exceptional Minerals Google Search for Omeiite John Betts Fine Minerals Search for Omeiite McDougall Minerals Google Search for Omeiite Mineral News Website Link Rock and Mineral Shows Google Search for Omeiite Weinrich Minerals, Inc. Google Search for Omeiite Ask about Omeiite here : Print or Cut-and-Paste your Omeiite Specimen Label here :
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