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Ruthenarsenite Mineral Data
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General Ruthenarsenite Information
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 Chemical Formula: |
(Ru,Ni)As |
| Composition: |
Molecular Weight = 165.40 gm |
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Nickel 8.87 % Ni |
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Arsenic 45.30 % As |
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Ruthenium 45.83 % Ru |
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______ |
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100.00 % |
| Empirical Formula: |
Ru0.75Ni0.25As |
| Environment: |
As inclusions in Os-Ir-Ru alloys and Alpine-type ultramafics. |
| IMA Status: |
Approved IMA 1974 |
| Locality: |
Papua New Guinea. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the composition. |
| Name Pronunciation: |
Ruthenarsenite + Pronunciation  |
| Synonym: |
ICSD 42577 |
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PDF 26-947 |
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Ruthenarsenite Image |
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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 |
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Ruthenarsenite Crystallography
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| Axial Ratios: |
a:b:c =1.7375:1:1.9092 |
| Cell Dimensions: |
a = 5.628, b = 3.239, c = 6.184, Z = 4; V = 112.73 Den(Calc)= 9.74 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma |
| X Ray Diffraction: |
By Intensity(I/Io): 2.061(1), 2.696(0.7), 2.124(0.5), |
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Physical Properties of Ruthenarsenite
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| Color: |
Brown, Brownish gray, Reddish gray. |
| Density: |
10 |
| Diaphaneity: |
Opaque |
| Habit: |
Inclusions - Generally found as inclusions in other minerals. |
| Hardness: |
6-6.5 - Orthoclase-Pyrite |
| Luster: |
Metallic |
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Optical Properties of Ruthenarsenite
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| RL Anisotrophism: |
Strong, orange-brown to light steel gray. |
| RL Color: |
Pale orange-brown to brownish gray. |
| RL Pleochroism: |
Distinct. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Ruthenarsenite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 470 nm |
46.10 |
48.80 |
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| 546 nm |
47.50 |
49.50 |
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| 589 nm |
49.30 |
50.90 |
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| 650 nm |
51.10 |
52.40 |
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Calculated Relative Intensity Colors of Ruthenarsenite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
180% |
190% |
| R1 |
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| R2 |
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Calculated Properties of Ruthenarsenite
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| Electron Density: |
Bulk Density (Electron Density)=8.60 gm/cc
note: Specific Gravity of Ruthenarsenite =9.74 gm/cc.
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| Fermion Index: |
Fermion Index = 0.13
Boson Index = 0.87 |
| Photoelectric: |
PERuthenarsenite = 130.21 barns/electron
U=PERuthenarsenite x rElectron Density=1,119.54 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ruthenarsenite is Not Radioactive |
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Ruthenarsenite Classification
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| Dana Class: |
02.08.17.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.08)where Am Bn Xp, with (m+n):p=1:1 |
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(02.08.17)Dana Group |
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02.08.17.01 Ruthenarsenite (Ru,Ni)As P nma 2/m 2/m 2/m |
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02.08.17.02 Cherepanovite RhAs P nma 2/m 2/m 2/m |
| Strunz Class: |
02.CC.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.C - Metal Sulfides, M:S = 1:1 (and similar) |
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02.CC -With Ni, Fe, Co, PGE, etc. |
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02.CC.15 Cherepanovite RhAs P nma 2/m 2/m 2/m |
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02.CC.15 Modderite (Co,Fe)As Pmcn 2/m 2/m 2/m |
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02.CC.15 Ruthenarsenite (Ru,Ni)As P nma 2/m 2/m 2/m |
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02.CC.15 Westerveldite (Fe,Ni,Co)As Pnam 2/m 2/m 2/m |
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Other Ruthenarsenite 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 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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Ruthenarsenite
(Ru,Ni)As
Dana No: 02.08.17.01 Strunz No: 02.CC.15
Locality:
Notes:
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