Cherepanovite Mineral Data (original) (raw)

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

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

Click Here for Larger Cherepanovite Image 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 - DipyramidalH-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 R 2 ∑ 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

RelativeIntensity 0% 30% 60% 90% 100% 120% 150% 180% 210% 220%
R1
R2

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:

02.08.17.02 (02)Sulfides - Including Selenides and Tellurides

(02.08)where Am Bn Xp, with (m+n):p=1:1

(02.08.17)Dana Group

02.08.17.01 Ruthenarsenite (Ru,Ni)As P nma 2/m 2/m 2/m

02.08.17.02 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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Print or Cut-and-Paste your Cherepanovite Specimen Label here :

Cherepanovite

RhAs
Dana No: 02.08.17.02 Strunz No: 02.CC.15
Locality:

Notes: