Mineralogy Database

Irarsite Mineral Data

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General Irarsite Information

Help on Chemical  Formula: Chemical Formula: (Ir,Ru,Rh,Pt)AsS
Help on Composition: Composition: Molecular Weight = 254.29 gm
   Arsenic    29.46 %  As
   Iridium    30.24 %  Ir
   Ruthenium  11.92 %  Ru
   Platinum    7.67 %  Pt
   Rhodium     8.09 %  Rh
   Sulfur     12.61 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Ir0.4Ru0.3Rh0.2Pt0.1AsS
Help on Environment: Environment: Grains in chromite in hortonolite dunite. Intergrown with hollingworthite or laurite.
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: Ub tge Onverwacht and Driekop mines, Transvaal, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the Iridium and ARSenic in the composition.
Help on Name Pronunciation: Name Pronunciation: Irarsite Say IRARSITE
 

Irarsite Image

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

  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

Irarsite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 5.777, Z = 5; V = 192.80 Den(Calc)= 10.95
Help on Crystal System: Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.74(1), 2.87(1), 3.32(1),
 

Physical Properties of Irarsite

Help on Color: Color: Iron black.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luster: Luster: Metallic
 

Optical Properties of Irarsite

Help on RL Color: RL Color: White, grayish with blue tint.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Irarsite in Air
λ R  ∑ R(λ) 
 420 nm   44.00   
 440 nm   43.70 
 460 nm   43.30 
 480 nm   42.60 
 500 nm   42.10 
 520 nm   41.20 
 540 nm   40.60 
 560 nm   39.70 
 580 nm   39.10 
 600 nm   38.60 
 620 nm   38.10 
 640 nm   37.80 
 660 nm   37.20 
 680 nm   36.80 
 700 nm   36.60 
Calculated Relative Intensity Colors of Irarsite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 230%
R                    
 

Calculated Properties of Irarsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=9.46 gm/cc
note: Specific Gravity of Irarsite =11.0 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEIrarsite = 614.75 barns/electron
U=PEIrarsite x rElectron Density=5,813.33 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Irarsite is Not Radioactive
 

Irarsite Classification

Help on  Dana Class: Dana Class: 02.12.03.07 (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.03)Cobaltite Group (Cubic or pseudocubic crystals)
 
02.12.03.01 Cobaltite CoAsS P ca21 mm2
 
02.12.03.02 Gersdorffite NiAsS P 213 2 3
 
02.12.03.03 Ullmannite NiSbS P 213 2 3
 
02.12.03.04 Willyamite (Co,Ni)SbS P 213 2 3
 
02.12.03.05 Tolovkite IrSbS P 213 2 3
 
02.12.03.06 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3
 
02.12.03.07 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3
 
02.12.03.08 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3
 
02.12.03.09 Jolliffeite (Ni,Co)AsSe P a3 2/m 3
 
02.12.03.10 Padmaite PdBiSe P 213 2 3
 
02.12.03.11 Michenerite (Pd,Pt)BiTe P 213 2 3
 
02.12.03.12 Maslovite PtBiTe P 213 2 3
 
02.12.03.13 Testibiopalladite PdTe(Sb,Te) P 213 2 3
 
02.12.03.14 Changchengite! IrBiS P 213 2 3
 
02.12.03.15 Milotaite! PdSbSe P 21/3 2 3
 
02.12.03.16 Kalungaite! PdAsSe Pa3 2/m 3
Help on  Strunz Class: Strunz Class: 02.EB.25 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.25 Cobaltite CoAsS P ca21 mm2
 
02.EB.25 Changchengite! IrBiS P 213 2 3
 
02.EB.25 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3
 
02.EB.25 Gersdorffite NiAsS P 213 2 3
 
02.EB.25 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3
 
02.EB.25 Jolliffeite (Ni,Co)AsSe P a3 2/m 3
 
02.EB.25 Krutovite NiAs2 P a3 2/m 3
 
02.EB.25 Michenerite (Pd,Pt)BiTe P 213 2 3
 
02.EB.25 Maslovite PtBiTe P 213 2 3
 
02.EB.25 Mayingite IrBiTe P a3 2/m 3
 
02.EB.25 Padmaite PdBiSe P 213 2 3
 
02.EB.25 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3
 
02.EB.25 Ullmannite NiSbS P 213 2 3
 
02.EB.25 Tolovkite IrSbS P 213 2 3
 
02.EB.25 Testibiopalladite PdTe(Sb,Te) P 213 2 3
 
02.EB.25 Willyamite (Co,Ni)SbS P 213 2 3
 
02.EB.25 Kalungaite! PdAsSe Pa3 2/m 3
 
02.EB.25 Milotaite! PdSbSe P 21/3 2 3
 

Other Irarsite 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 Irarsite :
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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Print or Cut-and-Paste your Irarsite Specimen Label here :

Irarsite

(Ir,Ru,Rh,Pt)AsS
Dana No: 02.12.03.07 Strunz No: 02.EB.25
Locality:

 

Notes:

 

 
   
 


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