| |
 |
Cherepanovite Mineral Data
|
|
|
General Cherepanovite Information
|
 Chemical Formula: |
RhAs |
| Composition: |
Molecular Weight = 177.83 gm |
| |
Arsenic 42.13 % As |
| |
Rhodium 57.87 % Rh |
| |
______ |
| |
100.00 % |
| Empirical Formula: |
RhAs |
| Environment: |
In a placer with other platinum group element minerals derived from an ultramafic massif in an ophiolite belt. |
| IMA Status: |
Approved IMA 1985 |
| Locality: |
From an undefined locality in the Koryak-Kamchatka region, northeastern USSR. Link to MinDat.org Location Data. |
| Name Origin: |
For V.A. Cherepanov (1927-1983), geologist and mineralogist. |
| Synonym: |
ICSD 42472 |
| |
PDF 38-407 |
| |
Cherepanovite Image |
|
Images:
|
|
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
|
| Axial Ratios: |
a:b:c =1.5877:1:1.6713 |
| Cell Dimensions: |
a = 5.7, b = 3.59, c = 6, Z = 4; V = 122.78 Den(Calc)= 9.62 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma |
| X Ray Diffraction: |
By Intensity(I/Io): 3.01(1), 2.1(0.6), 1.771(0.2), |
| |
Physical Properties of Cherepanovite
|
| Color: |
Grayish black, Black. |
| Density: |
9.72 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Hardness: |
6 - Orthoclase |
| Luster: |
Metallic |
| Streak: |
black |
| |
Optical Properties of Cherepanovite
|
| RL Anisotrophism: |
Green to gray-brown. |
| RL Color: |
White with orange tint. |
| RL Pleochroism: |
Weak, in yellow to pinkish hue and bluish white. |
| 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
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
220% |
| R1 |
|
|
|
|
|
|
|
|
|
|
| R2 |
|
|
|
|
|
|
|
|
|
|
|
| |
Calculated Properties of Cherepanovite
|
| Electron Density: |
Bulk Density (Electron Density)=8.44 gm/cc
note: Specific Gravity of Cherepanovite =9.62 gm/cc.
|
| Fermion Index: |
Fermion Index = 0
Boson Index = 1 |
| Photoelectric: |
PECherepanovite = 159.98 barns/electron
U=PECherepanovite x rElectron Density=1,350.14 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cherepanovite is Not Radioactive |
| |
Cherepanovite Classification
|
| 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 |
| 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
|
| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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
Search for Cherepanovite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Cherepanovite :
Ask about Cherepanovite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espaņol
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:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.