Anduoite Mineral Data + Say ANDUOITE


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General Anduoite Information

Help on Chemical  Formula: Chemical Formula: (Ru,Os)As2
Help on Composition: Composition: Molecular Weight = 273.20 gm
   Arsenic    54.85 %  As
   Osmium     17.41 %  Os
   Ruthenium  27.75 %  Ru
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Ru0.75Os0.25As2
Help on Environment: Environment: Occurs in a chromium deposit related to augite peridotite and dunite.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: From Anduo, Tibet, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the Chinese locality at Anduo.
Help on Synonym: Synonym: ICSD 42738
  PDF 33-1144
 

Anduoite Image

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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

Anduoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8717:1:0.485
Help on Cell Dimensions: Cell Dimensions: a = 5.41, b = 6.206, c = 3.01, Z = 2; V = 101.06 Den(Calc)= 8.98
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.92(1), 1.095(0.9), 1.501(0.9),
Click Here for Large Anduoite Structure Window Crystal Structure:

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RuAs2 , Kjekshus A , Rakke T , Andresen A F , Acta Chemica Scandinavica A , 31 (1977) p.253-259, Compounds with the marcasite type crystal structure. XII. Structural data for, RuP2, RuAs2, RuSb2, OsP2, OsAs2, and OsSb2, Locality: synthetic

 

Physical Properties of Anduoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Lead gray.
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Malleable - Deforms rather than breaking apart with a hammer.
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 7 - Quartz
Help on Luster: Luster: Metallic
Help on Streak: Streak: grayish black
 

Optical Properties of Anduoite

Help on RL Anisotrophism: RL Anisotrophism: Marked in air from brownish yellow to grayish green, pale red to pale green, pronounced in oil.
Help on RL Color: RL Color: White with pink tint.
Help on RL Pleochroism: RL Pleochroism: Noticeable in air, from pinkish grayish white to pinkish white, distinct in oil.
 

Calculated Properties of Anduoite

Help on Electron Density: Electron Density:

relectron=7.76 gm/cc
note: rAnduoite =8.98 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.11349
Boson Index = 0.88651
Help on Photoelectric: Photoelectric:

PEAnduoite = 336.17 barns/electron
U=PEAnduoite x relectron=2,607.78 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Anduoite is Not Radioactive

 

Anduoite Classification

Help on  Dana Class: Dana Class: 2.12.2.8 (2)Sulfides - Including Selenides and Tellurides
  (2.12)where Am Bn Xp, with (m+n):p=1:2
  (2.12.2)Marcasite Group (Orthorhombic: Pnnm)
 
2.12.2.1 Marcasite FeS2 Pnnm 2/m 2/m 2/m
 
2.12.2.2 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.3 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m
 
2.12.2.4 Hastite CoSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.5 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m
 
2.12.2.6 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.7 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.8 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.9 Lollingite FeAs2 Pnnm 2/m 2/m 2/m
 
2.12.2.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m
 
2.12.2.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m
 
2.12.2.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: II/D.20-70 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.20 - Markasite - Iridarsenite series
 
II/D.20-10 Marcasite FeS2 Pnnm 2/m 2/m 2/m
 
II/D.20-20 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m
 
II/D.20-30 Hastite CoSe2 Pnnm 2/m 2/m 2/m
 
II/D.20-40 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m
 
II/D.20-50 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m
 
II/D.20-60 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m
 
II/D.20-70 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m
 
II/D.20-80 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m
 
II/D.20-90 Iridarsenite (Ir,Ru)As2 P 21/c 2/m
 

Other Anduoite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Anduoite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Anduoite

(Ru,Os)As2
Dana No: 2.12.2.8 Strunz No: II/D.20-70
Locality:

 

Notes:

 

 
   
 
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