Anduoite Mineral Data

General Anduoite Information

Chemical Formula:

(Ru,Os)As2

Composition:

Molecular Weight = 273.20 gm

Arsenic 54.85 % As

Osmium 17.41 % Os

Ruthenium 27.75 % Ru

______

100.00 %

Empirical Formula:

Ru_0.75Os_0.25As₂

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

PDF 33-1144

Anduoite Image

Images:

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

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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.92(1), 1.095(0.9), 1.501(0.9),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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

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

Optical Properties of Anduoite

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.

Calculated Properties of Anduoite

Electron Density:

Bulk Density (Electron Density)=7.76 gm/cc
note: Specific Gravity of Anduoite =8.98 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Anduoite= 336.17 barns/electron
U=PE_Anduoite x rElectron Density=2,607.79 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Anduoite is Not Radioactive

Anduoite Classification

Dana Class:

02.12.02.08 (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)

02.12.02.01 Marcasite FeS2 Pnnm 2/m 2/m 2/m

02.12.02.02 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m

02.12.02.03 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m

02.12.02.04 Hastite? CoSe2 Pnnm 2/m 2/m 2/m

02.12.02.05 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m

02.12.02.06 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m

02.12.02.07 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m

02.12.02.08 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m

02.12.02.09 Lollingite FeAs2 Pnnm 2/m 2/m 2/m

02.12.02.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m

02.12.02.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m

02.12.02.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m

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

02.E - Metal Sulfides, M:S £ 1:2

02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc.

02.EB.15a Clinosafflorite (Co,Fe,Ni)As2 P 2₁/n 2/m

02.EB.15a Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m

02.EB.15a Lollingite FeAs2 Pnnm 2/m 2/m 2/m

02.EB.15a Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m

02.EB.15a Nisbite NiSb2 Pnnm 2/m 2/m 2/m

02.EB.15a Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m

02.EB.15a Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m

Other Anduoite Information

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

Search for Anduoite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Anduoite :

A Bijoux Google Search for Anduoite
Adam's Minerals Google Search for Anduoite
Cape Minerals Google Search for Anduoite
Dakota Matrix Minerals Google Search for Anduoite
Excalibur Mineral Corp. Google Search for Anduoite
Exceptional Minerals Google Search for Anduoite
John Betts Fine Minerals Search for Anduoite
McDougall Minerals Google Search for Anduoite
Mineral News Website Link
Rock and Mineral Shows Google Search for Anduoite
Weinrich Minerals, Inc. Google Search for Anduoite

Ask about Anduoite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Anduoite Specimen Label here :

Anduoite

(Ru,Os)As2
Dana No: 02.12.02.08 Strunz No: 02.EB.15a
Locality:

Notes: