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Anduoite Mineral Data
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General Anduoite Information
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 Chemical Formula: |
(Ru,Os)As2 |
| Composition: |
Molecular Weight = 273.20 gm |
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Arsenic 54.85 % As |
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Osmium 17.41 % Os |
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Ruthenium 27.75 % Ru |
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______ |
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100.00 % |
| Empirical Formula: |
Ru0.75Os0.25As2 |
| Environment: |
Occurs in a chromium deposit related to augite peridotite and dunite. |
| IMA Status: |
Approved IMA 1979 |
| Locality: |
From Anduo, Tibet, China. Link to MinDat.org Location Data. |
| Name Origin: |
For the Chinese locality at Anduo. |
| Name Pronunciation: |
Anduoite  |
| Synonym: |
ICSD 42738 |
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PDF 33-1144 |
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Anduoite Image |
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Images:
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Anduoite
Comments: Backscattered electron Image of euhedral anduoite crystal enclosed in chromian spinel containing lamellae of ilmenite. Image on left is large view, image on right is detailed view. (CanMin, v 39, p 596).
Location: Chromitite ore, Kapitanov deposit, Ukrainian Shield, Ukraine.
Scale: See Image.
© Canadian Mineralogist |
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Anduoite Crystallography
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| Axial Ratios: |
a:b:c =0.8717:1:0.485 |
| Cell Dimensions: |
a = 5.41, b = 6.206, c = 3.01, Z = 2; V = 101.06 Den(Calc)= 8.98 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm |
| X Ray Diffraction: |
By Intensity(I/Io): 1.92(1), 1.095(0.9), 1.501(0.9), |
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Physical Properties of Anduoite
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| Cleavage: |
None |
| Color: |
Lead gray. |
| Diaphaneity: |
Opaque |
| Fracture: |
Malleable - Deforms rather than breaking apart with a hammer. |
| Habit: |
Inclusions - Generally found as inclusions in other minerals. |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
7 - Quartz |
| Luster: |
Metallic |
| Streak: |
grayish black |
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Optical Properties of Anduoite
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| RL Anisotrophism: |
Marked in air from brownish yellow to grayish green, pale red to pale green, pronounced in oil. |
| RL Color: |
White with pink tint. |
| RL Pleochroism: |
Noticeable in air, from pinkish grayish white to pinkish white, distinct in oil. |
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Calculated Properties of Anduoite
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| Electron Density: |
Bulk Density (Electron Density)=7.76 gm/cc
note: Specific Gravity of Anduoite =8.98 gm/cc.
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| Fermion Index: |
Fermion Index = 0.11
Boson Index = 0.89 |
| Photoelectric: |
PEAnduoite = 336.17 barns/electron
U=PEAnduoite x rElectron Density=2,607.79 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Anduoite is Not Radioactive |
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Anduoite Classification
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| Dana Class: |
02.12.02.08 (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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(02.12.02)Marcasite Group (Orthorhombic: Pnnm) |
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02.12.02.01 Marcasite FeS2 Pnnm 2/m 2/m 2/m |
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02.12.02.02 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m |
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02.12.02.03 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m |
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02.12.02.04 Hastite? CoSe2 Pnnm 2/m 2/m 2/m |
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02.12.02.05 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m |
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02.12.02.06 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m |
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02.12.02.07 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m |
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02.12.02.08 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m |
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02.12.02.09 Lollingite FeAs2 Pnnm 2/m 2/m 2/m |
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02.12.02.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m |
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02.12.02.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m |
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02.12.02.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m |
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02.12.02.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m |
| Strunz Class: |
02.EB.15a 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.15a Clinosafflorite (Co,Fe,Ni)As2 P 21/n 2/m |
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02.EB.15a Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Lollingite FeAs2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Nisbite NiSb2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m |
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02.EB.15a Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m |
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Other Anduoite 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 Anduoite :
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
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Anduoite
(Ru,Os)As2
Dana No: 02.12.02.08 Strunz No: 02.EB.15a
Locality:
Notes:
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