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![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
Osarsite Mineral Data
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General Osarsite Information
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Chemical Formula: |
(Os,Ru)AsS |
Composition: |
Molecular Weight = 274.91 gm |
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Arsenic 27.25 % As |
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Osmium 51.89 % Os |
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Ruthenium 9.19 % Ru |
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Sulfur 11.66 % S |
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100.00 % |
Empirical Formula: |
Os0.75Ru0.25AsS |
Environment: |
In a platinum-bearing sample of placer sand. |
IMA Status: |
Approved IMA 1972 |
Locality: |
Gold Bluff, 3 to 6 miles north of Orick, Humboldt Co., California. Link to MinDat.org Location Data. |
Name Origin: |
Named after it's chemical composition of osmium and arsenic. |
Name Pronunciation: |
Osarsite |
Synonym: |
ICSD 42580 |
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PDF 25-595 |
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Osarsite Crystallography
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Axial Ratios: |
a:b:c =1.0028:1:1.0157 |
Cell Dimensions: |
a = 5.933, b = 5.916, c = 6.009, Z = 4; beta = 112.35° V = 195.07 Den(Calc)= 9.36 |
Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c |
X Ray Diffraction: |
By Intensity(I/Io): 1.892(1), 3.79(1), 1.87(0.8), |
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Physical Properties of Osarsite
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Color: |
Gray. |
Density: |
8.44 |
Diaphaneity: |
Opaque |
Habit: |
Intergrown Crystals - Occurs as intergrown crystalline aggregates |
Hardness: |
6 - Orthoclase |
Luster: |
Metallic |
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Optical Properties of Osarsite
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RL Anisotrophism: |
Weak but distinct in air. |
RL Color: |
Gray. |
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Calculated Properties of Osarsite
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Electron Density: |
Bulk Density (Electron Density)=7.97 gm/cc note: Specific Gravity of Osarsite =9.36 gm/cc. |
Fermion Index: |
Fermion Index = 0.12 Boson Index = 0.88 |
Photoelectric: |
PEOsarsite = 759.50 barns/electron U=PEOsarsite x rElectron Density=6,051.10 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Osarsite is Not Radioactive |
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Osarsite Classification
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Dana Class: |
02.12.04.03 (02)Sulfides - Including Selenides and Tellurides |
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(02.12)where Am Bn Xp, with (m+n):p=1:2 |
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(02.12.04)Arsenopyrite Group (Monoclinic: P21/c (Pseudo-orthorhombic)) |
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02.12.04.01 Arsenopyrite FeAsS P 21/c 2/m |
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02.12.04.02 Gudmundite FeSbS P 21/n 2/m |
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02.12.04.03 Osarsite (Os,Ru)AsS P 21/c 2/m |
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02.12.04.04 Ruarsite RuAsS P 21/c 2/m |
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02.12.04.05 Iridarsenite (Ir,Ru)As2 P 21/c 2/m |
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02.12.04.06 Clinosafflorite (Co,Fe,Ni)As2 P 21/n 2/m |
Strunz Class: |
02.EB.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.E - Metal Sulfides, M:S � 1:2 |
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02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc. |
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02.EB.20 Arsenopyrite FeAsS P 21/c 2/m |
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02.EB.20 Gudmundite FeSbS P 21/n 2/m |
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02.EB.20 Ruarsite RuAsS P 21/c 2/m |
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02.EB.20 Paxite CuAs2 P 21/c 2/m |
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02.EB.20 Osarsite (Os,Ru)AsS P 21/c 2/m |
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Other Osarsite Information
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References: |
NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Osarsite :
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 Osarsite Specimen Label here :
Osarsite
(Os,Ru)AsS
Dana No: 02.12.04.03 Strunz No: 02.EB.20
Locality:
Notes:
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