Cherepanovite
A valid IMA mineral species
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About Cherepanovite
Formula:
RhAs
Colour:
Gray-white
Lustre:
Metallic
Hardness:
6
Specific Gravity:
9.72 (Calculated)
Crystal System:
Orthorhombic
Name:
For Vladimir Aleksandrovich Cherepanov (Владимир Александрович Черепанов) (1927-1983) Russian geologist and mineralogist, Karpinskii All-Union Research Institute of Geology, St. Petersburg, Russia.
Unique Identifiers
Mindat ID:
990
Long-form identifier:
mindat:1:1:990:0
IMA Classification of Cherepanovite
Approved
Approval year:
1984
First published:
1985
Classification of Cherepanovite
2.CC.15
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
C : With Ni, Fe, Co, PGE, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
C : With Ni, Fe, Co, PGE, etc.
2.8.17.2
2 : SULFIDES
8 : AmXp, with m:p = 1:1
2 : SULFIDES
8 : AmXp, with m:p = 1:1
3.12.11
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
12 : Sulphides etc. of the platinum metals
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
12 : Sulphides etc. of the platinum metals
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Cpv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Cherepanovite
Metallic
Transparency:
Opaque
Colour:
Gray-white
Streak:
Grayish black
Hardness:
6 on Mohs scale
Hardness:
VHN50=726 - 754 kg/mm2 - Vickers
Cleavage:
Distinct/Good
One distinct direction
One distinct direction
Density:
9.72 g/cm3 (Calculated)
Optical Data of Cherepanovite
Anisotropism:
Green to gray-brown
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 420nm | 39.2% | 40.5% |
| 440nm | 39.6% | 41.0% |
| 460nm | 40.3% | 41.9% |
| 480nm | 41.0% | 42.9% |
| 500nm | 41.9% | 43.8% |
| 520nm | 42.7% | 44.7% |
| 540nm | 43.6% | 45.5% |
| 560nm | 44.1% | 46.1% |
| 580nm | 44.5% | 46.6% |
| 600nm | 44.9% | 47.1% |
| 620nm | 45.1% | 47.3% |
| 640nm | 45.2% | 47.4% |
| 660nm | 45.3% | 47.6% |
| 680nm | 45.5% | 47.6% |
| 700nm | 45.4% | 47.6% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 47.6%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White with an orange tint
Pleochroism:
Weak
Comments:
In yellow to pinkish hue and bluish white.
Chemistry of Cherepanovite
Mindat Formula:
RhAs
Elements listed:
Common Impurities:
Ru,Pt,Ni
Crystallography of Cherepanovite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 5.70(2) Å, b = 3.59(1) Å, c = 6.00(1) Å
Ratio:
a:b:c = 1.588 : 1 : 1.671
Unit Cell V:
122.78 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Grains to 20 microns.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
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CIF File Best | x | y | z | a | b | c
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Labels
Console Off | On | Grey | Yellow
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020514 | Cherepanovite | Heyding R D, Calvert L D (1961) Arsenides of the transition metals IV. A note on the platinum metal arsenides Canadian Journal of Chemistry 39 955-957 | 1961 | Synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.01 Å | (10) |
| 2.10 Å | (6) |
| 1.771 Å | (2) |
| 1.501 Å | (2) |
| 1.354 Å | (2) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 26 : Hadean detrital minerals | |
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 36 : Carbonatites, kimberlites, and related igneous rocks | |
| 37 : Layered igneous intrusions and related PGE minerals |
Type Occurrence of Cherepanovite
General Appearance of Type Material:
Individual grains (up to 20 microns) or their aggregates (up to 100 microns) included in ferronickelplatinum or among aggregates of cooperite.
Place of Conservation of Type Material:
Mining Institute, St. Petersburg, Russia, 2103/1.
Geological Setting of Type Material:
Placer platinum deposit derived from ultramafic massif in ophiolite belt.
Associated Minerals at Type Locality:
Synonyms of Cherepanovite
Other Language Names for Cherepanovite
Common Associates
Associations Based on Photo Data:
| 2 photos of Cherepanovite associated with Isoferroplatinum | Pt3Fe |
| 1 photo of Cherepanovite associated with Cooperite | PtS |
| 1 photo of Cherepanovite associated with Native Osmium | (Os,Ir,Ru) |
| 1 photo of Cherepanovite associated with Native Platinum | Pt |
| 1 photo of Cherepanovite associated with Polkanovite | Rh12As7 |
| 1 photo of Cherepanovite associated with Native Ruthenium | (Ru,Ir) |
| 1 photo of Cherepanovite associated with Palladodymite | (Pd,Rh)2As |
Related Minerals - Strunz-mindat Grouping
| 2.CC. | Eliopoulosite | V7S8 |
| 2.CC. | Tilkerodeite | Pd2HgSe3 |
| 2.CC. | 'UM2007-26-S:CuFeIrNiPtRh' | (Ir,Cu,Ni,Pt,Rh,Fe)9S11 |
| 2.CC. | Proxitwelvefoldite | Pd3Ni4Te8 |
| 2.CC. | Ferrotorryweiserite | Rh5Fe10S16 |
| 2.CC. | Tamuraite | Ir5Fe10S16 |
| 2.CC. | Crowningshieldite | (Ni0.9Fe0.1)S |
| 2.CC. | Kuvaevite | Ir5Ni10S16 |
| 2.CC. | Torryweiserite | Rh5Ni10S16 |
| 2.CC.05 | Achávalite | FeSe |
| 2.CC.05 | Langisite | CoAs |
| 2.CC.05 | Sederholmite | NiSe |
| 2.CC.05 | Freboldite | CoSe |
| 2.CC.05 | Nickeline | NiAs |
| 2.CC.05 | Sobolevskite | PdBi |
| 2.CC.05 | Jaipurite | CoS |
| 2.CC.05 | Kotulskite | Pd(Te,Bi)2-x (x ≈ 0.4) |
| 2.CC.05 | Zlatogorite | NiCuSb2 |
| 2.CC.05 | Stumpflite | PtSb |
| 2.CC.05 | Sudburyite | PdSb |
| 2.CC.05 | Breithauptite | NiSb |
| 2.CC.10 | Pyrrhotite | Fe1-xS |
| 2.CC.10 | Smythite | (Fe,Ni)3+xS4 (x=0-0.3) |
| 2.CC.10 | Troilite | FeS |
| 2.CC.15 | Ruthenarsenite | (Ru,Ni)As |
| 2.CC.15 | Westerveldite | (Fe,Ni,Co)As |
| 2.CC.15 | Modderite | CoAs |
| 2.CC.15 | Minakawaite | RhSb |
| 2.CC.20 | 'UM1990-38-S:CuFeIrNiPtRh' | (Ni,Fe,Rh,Cu,Ir,Pt)S |
| 2.CC.20 | Millerite | NiS |
| 2.CC.20 | Mäkinenite | NiSe |
| 2.CC.25 | Mackinawite | FeS |
| 2.CC.30 | Vavřínite | Ni2SbTe2 |
| 2.CC.30 | 'Hexatestibiopanickelite' | (Pd,Ni)(Sb,Te) ? |
| 2.CC.35b | Cooperite | PtS |
| 2.CC.35a | Vysotskite | PdS |
| 2.CC.35a | Braggite | PdPt3S4 |
| 2.CC.45 | Jacutingaite | Pt2HgSe3 |
| 2.CC.50 | 'Imgreite' | NiTe (?) |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Cherepanovite
mindat.org URL:
https://www.mindat.org/min-990.html
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References for Cherepanovite
Reference List:
Localities for Cherepanovite
Showing 26 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Brazil | |
| Teixeira (2014) |
Canada | |
| McDonald et al. (2015) |
| Smith (2021) |
India | |
| Devaraju et al. (2005) |
Japan | |
| NISHIO–HAMANE et al. (2022) |
| NISHIO–HAMANE et al. (2022) | |
| NISHIO–HAMANE et al. (2022) |
| NISHIO–HAMANE et al. (2022) |
| NISHIO–HAMANE et al. (2022) |
| NISHIO–HAMANE et al. (2019) |
New Zealand | |
| Railton et al. (1990) | |
| Railton et al. (1990) |
Russia | |
| Airiyants et al. (2021) |
| Britvin et al. (1998) +1 other reference |
| Rudashevskiy et al. (1985) +1 other reference |
| Zhmodik et al. (2016) |
| ZVMO 114 (1985) +1 other reference | |
| ... | |
| Barkov et al. (2018) +1 other reference |
| Shcheka et al. (2004) |
| Jan Pašava et al. (2011) |
| Kojonen et al. (2003, April) +2 other references | |
South Africa | |
| Melcher et al. (2007) |
| Melcher et al. (2005) | |
| Zaccarini et al. (2002) +1 other reference |
USA | |
| ... |
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Placer deposit, Northern Pekul'ney River, Pekul'ney Range, Chukotka Autonomous Okrug, Russia