Mineralogy Database

Ruthenarsenite Mineral Data

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General Ruthenarsenite Information

Help on Chemical  Formula: Chemical Formula: (Ru,Ni)As
Help on Composition: Composition: Molecular Weight = 165.40 gm
   Nickel      8.87 %  Ni
   Arsenic    45.30 %  As
   Ruthenium  45.83 %  Ru
             100.00 % 
Help on Empirical Formula: Empirical Formula: Ru0.75Ni0.25As
Help on Environment: Environment: As inclusions in Os-Ir-Ru alloys and Alpine-type ultramafics.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: Papua New Guinea. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition.
Help on Name Pronunciation: Name Pronunciation: Ruthenarsenite + Pronunciation Say RUTHENARSENITE
Help on Synonym: Synonym: ICSD 42577
  PDF 26-947

Ruthenarsenite Image

Click Here for Larger   Image in a New Browser Window Images:
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  Ruthenarsenite   Irarsite

Comments: Photomicrograph of the largest inclusion of ruthenarsenite (Ru) associated with irarsite inclusions (Ir) in a rutheniridosmine matrix. (CanMin, v12:280).
Location: Papua New Guinea. Scale: See Image.
© Canadian Mineralogist

Ruthenarsenite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7375:1:1.9092
Help on Cell Dimensions: Cell Dimensions: a = 5.628, b = 3.239, c = 6.184, Z = 4; V = 112.73 Den(Calc)= 9.74
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.061(1), 2.696(0.7), 2.124(0.5),

Physical Properties of Ruthenarsenite

Help on Color: Color: Brown, Brownish gray, Reddish gray.
Help on Density: Density: 10
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luster: Luster: Metallic

Optical Properties of Ruthenarsenite

Help on RL Anisotrophism: RL Anisotrophism: Strong, orange-brown to light steel gray.
Help on RL Color: RL Color: Pale orange-brown to brownish gray.
Help on RL Pleochroism: RL Pleochroism: Distinct.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Ruthenarsenite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   46.10   48.80 
 546 nm   47.50   49.50 
 589 nm   49.30   50.90 
 650 nm   51.10   52.40 
Calculated Relative Intensity Colors of Ruthenarsenite in Air
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180% 190%

Calculated Properties of Ruthenarsenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=8.60 gm/cc
note: Specific Gravity of Ruthenarsenite =9.74 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.13
Boson Index = 0.87
Help on Photoelectric: Photoelectric: PERuthenarsenite = 130.21 barns/electron
U=PERuthenarsenite x rElectron Density=1,119.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ruthenarsenite is Not Radioactive

Ruthenarsenite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.17)Dana Group Ruthenarsenite (Ru,Ni)As P nma 2/m 2/m 2/m Cherepanovite RhAs P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.CC.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.C - Metal Sulfides, M:S = 1:1 (and similar)
  02.CC -With Ni, Fe, Co, PGE, etc.
02.CC.15 Cherepanovite RhAs P nma 2/m 2/m 2/m
02.CC.15 Modderite (Co,Fe)As Pmcn 2/m 2/m 2/m
02.CC.15 Ruthenarsenite (Ru,Ni)As P nma 2/m 2/m 2/m
02.CC.15 Westerveldite (Fe,Ni,Co)As Pnam 2/m 2/m 2/m

Other Ruthenarsenite 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 Ruthenarsenite :
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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Dana No: Strunz No: 02.CC.15





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