Mineralogy Database

Cherepanovite Mineral Data

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General Cherepanovite Information

Help on Chemical  Formula: Chemical Formula: RhAs
Help on Composition: Composition: Molecular Weight = 177.83 gm
   Arsenic  42.13 %  As
   Rhodium  57.87 %  Rh
           100.00 % 
Help on Empirical Formula: Empirical Formula: RhAs
Help on Environment: Environment: In a placer with other platinum group element minerals derived from an ultramafic massif in an ophiolite belt.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: From an undefined locality in the Koryak-Kamchatka region, northeastern USSR. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For V.A. Cherepanov (1927-1983), geologist and mineralogist.
Help on Synonym: Synonym: ICSD 42472
  PDF 38-407

Cherepanovite Image

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  Cherepanovite   Cooperite   Platinum

Comments: Creamy-grayish fractured grains of cherepanovite with gray granular cooperite and white massive grains of iridian ruthenian platinum. Polished section in reflected light.
Location: Placer Deposit, Northern Pekul'nei River, Pekul'nei Range, Chukotka (Tchukotka) Okrug, Chukot Peninsula, Far-Eastern Region, Russia. Scale: Picture size 0.12 mm.
© Thomas Witzke / Abraxas-Verlag

Cherepanovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.5877:1:1.6713
Help on Cell Dimensions: Cell Dimensions: a = 5.7, b = 3.59, c = 6, Z = 4; V = 122.78 Den(Calc)= 9.62
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): 3.01(1), 2.1(0.6), 1.771(0.2),

Physical Properties of Cherepanovite

Help on Color: Color: Grayish black, Black.
Help on Density: Density: 9.72
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Cherepanovite

Help on RL Anisotrophism: RL Anisotrophism: Green to gray-brown.
Help on RL Color: RL Color: White with orange tint.
Help on RL Pleochroism: RL Pleochroism: Weak, in yellow to pinkish hue and bluish white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Cherepanovite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 420 nm   39.20   40.50 
 440 nm   39.60   41.00 
 460 nm   40.30   41.90 
 480 nm   41.00   42.90 
 500 nm   41.90   43.80 
 520 nm   42.70   44.70 
 540 nm   43.60   45.50 
 560 nm   44.10   46.10 
 580 nm   44.50   46.60 
 600 nm   44.90   47.10 
 620 nm   45.10   47.30 
 640 nm   45.20   47.40 
 660 nm   45.30   47.60 
 680 nm   45.50   47.60 
 700 nm   45.40   47.60 
Calculated Relative Intensity Colors of Cherepanovite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210% 220%

Calculated Properties of Cherepanovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=8.44 gm/cc
note: Specific Gravity of Cherepanovite =9.62 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0
Boson Index = 1
Help on Photoelectric: Photoelectric: PECherepanovite = 159.98 barns/electron
U=PECherepanovite x rElectron Density=1,350.14 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cherepanovite is Not Radioactive

Cherepanovite 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 Cherepanovite 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 Cherepanovite :
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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