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Cooperite Mineral Data
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General Cooperite Information
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 Chemical Formula: |
(Pt,Pd,Ni)S |
| Composition: |
Molecular Weight = 186.91 gm |
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Nickel 3.14 % Ni |
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Palladium 17.08 % Pd |
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Platinum 62.62 % Pt |
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Sulfur 17.16 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pt0.6Pd0.3Ni0.1S |
| Environment: |
A significant platinum ore mineral, found in concentrates from norites. |
| IMA Status: |
Valid Species (Pre-IMA) 1928 |
| Locality: |
At various locations along the Merensky Reef of the Bushveld Complex, Transvaal, South Africa. Link to MinDat.org Location Data. |
| Name Origin: |
For R.A. Cooper, of Johannesburg, South Africa, who first described the mineral. |
| Synonym: |
ICSD 41376 |
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PDF 26-1302 |
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Cooperite Image |
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Images:
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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 |
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Images:
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Osmium Cooperite Vasilite Vysotskite
Comments: BSE image taken with a SEM of the sulfide-dominant microparagenesis filling a gas vacuole. Cooperite crystal surrounded by Pd-Cu-Pt-S phase (vasilite?), vysotskite and osmium laths (white) in chalcopyrite-bornite matrix (dark). (CanMin 38:1258).
Location: Pustaya River placer deposit, situated within the Koryak-Kamchatka platinum-bearing belt of Alaskan-type intrusions in eastern Russia.
Scale: See Image.
© Canadian Mineralogist |
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Cooperite Crystallography
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| Axial Ratios: |
a:c = 1:1.75792 |
| Cell Dimensions: |
a = 3.47, c = 6.1, Z = 2; V = 73.45 Den(Calc)= 8.45 |
| Crystal System: |
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 41/mmc |
| X Ray Diffraction: |
By Intensity(I/Io): 3.03(1), 1.51(0.8), 1.918(0.7), |
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Physical Properties of Cooperite
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| Cleavage: |
None |
| Color: |
Steel gray. |
| Density: |
9.5 |
| Diaphaneity: |
Opaque |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
| Hardness: |
4-5 - Fluorite-Apatite |
| Luster: |
Metallic |
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Optical Properties of Cooperite
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| RL Anisotrophism: |
Strong, greenish gray to whitish yellow to bluish white. |
| RL Color: |
Brownish steel gray. |
| RL Pleochroism: |
From white to creamy white to bluish white. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Cooperite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
40.90 |
46.60 |
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| 420 nm |
42.00 |
47.30 |
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| 440 nm |
42.60 |
47.90 |
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| 460 nm |
42.70 |
48.30 |
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| 480 nm |
42.20 |
48.40 |
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| 500 nm |
41.50 |
48.20 |
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| 520 nm |
40.40 |
47.80 |
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| 540 nm |
39.40 |
47.20 |
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| 560 nm |
38.50 |
46.60 |
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| 580 nm |
37.80 |
46.10 |
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| 600 nm |
37.20 |
45.50 |
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| 620 nm |
36.60 |
45.10 |
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| 640 nm |
36.00 |
44.70 |
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| 660 nm |
35.60 |
44.20 |
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| 680 nm |
35.10 |
43.70 |
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| 700 nm |
34.60 |
43.30 |
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Calculated Relative Intensity Colors of Cooperite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
| R1 |
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| R2 |
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Calculated Properties of Cooperite
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| Electron Density: |
Bulk Density (Electron Density)=7.18 gm/cc
note: Specific Gravity of Cooperite =8.45 gm/cc.
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| Fermion Index: |
Fermion Index = 0.25
Boson Index = 0.75 |
| Photoelectric: |
PECooperite = 999.37 barns/electron
U=PECooperite x rElectron Density=7,174.69 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cooperite is Not Radioactive |
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Cooperite Classification
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| Dana Class: |
02.08.05.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.08)where Am Bn Xp, with (m+n):p=1:1 |
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(02.08.05)Cooperite Group |
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02.08.05.01 Cooperite (Pt,Pd,Ni)S P 41/mmc 4/m 2/m 2/m |
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02.08.05.02 Vysotskite (Pd,Ni)S P 41/m 4/m |
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02.08.05.03 Braggite (Pt,Pd,Ni)S P 41/m 4/m |
| Strunz Class: |
02.CC.35a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.C - Metal Sulfides, M:S = 1:1 (and similar) |
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02.CC -With Ni, Fe, Co, PGE, etc. |
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02.CC.35a Braggite (Pt,Pd,Ni)S P 41/m 4/m |
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02.CC.35a Cooperite (Pt,Pd,Ni)S P 41/mmc 4/m 2/m 2/m |
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02.CC.35a Vysotskite (Pd,Ni)S P 41/m 4/m |
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Other Cooperite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Cooperite :
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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Cooperite
(Pt,Pd,Ni)S
Dana No: 02.08.05.01 Strunz No: 02.CC.35a
Locality:
Notes:
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