Mineralogy Database

Cooperite Mineral Data

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General Cooperite Information

Help on Chemical  Formula: Chemical Formula: (Pt,Pd,Ni)S
Help on Composition: Composition: Molecular Weight = 186.91 gm
   Nickel      3.14 %  Ni
   Palladium  17.08 %  Pd
   Platinum   62.62 %  Pt
   Sulfur     17.16 %  S
             100.00 % 
Help on Empirical Formula: Empirical Formula: Pt0.6Pd0.3Ni0.1S
Help on Environment: Environment: A significant platinum ore mineral, found in concentrates from norites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1928
Help on Locality: Locality: At various locations along the Merensky Reef of the Bushveld Complex, Transvaal, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For R.A. Cooper, of Johannesburg, South Africa, who first described the mineral.
Help on Synonym: Synonym: ICSD 41376
  PDF 26-1302

Cooperite 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

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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

Cooperite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.75792
Help on Cell Dimensions: Cell Dimensions: a = 3.47, c = 6.1, Z = 2; V = 73.45 Den(Calc)= 8.45
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 41/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.03(1), 1.51(0.8), 1.918(0.7),

Physical Properties of Cooperite

Help on Cleavage: Cleavage: None
Help on Color: Color: Steel gray.
Help on Density: Density: 9.5
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Metallic

Optical Properties of Cooperite

Help on RL Anisotrophism: RL Anisotrophism: Strong, greenish gray to whitish yellow to bluish white.
Help on RL Color: RL Color: Brownish steel gray.
Help on RL Pleochroism: RL Pleochroism: From white to creamy white to bluish white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Cooperite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   40.90   46.60 
 420 nm   42.00   47.30 
 440 nm   42.60   47.90 
 460 nm   42.70   48.30 
 480 nm   42.20   48.40 
 500 nm   41.50   48.20 
 520 nm   40.40   47.80 
 540 nm   39.40   47.20 
 560 nm   38.50   46.60 
 580 nm   37.80   46.10 
 600 nm   37.20   45.50 
 620 nm   36.60   45.10 
 640 nm   36.00   44.70 
 660 nm   35.60   44.20 
 680 nm   35.10   43.70 
 700 nm   34.60   43.30 
Calculated Relative Intensity Colors of Cooperite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240%

Calculated Properties of Cooperite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.18 gm/cc
note: Specific Gravity of Cooperite =8.45 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.25
Boson Index = 0.75
Help on Photoelectric: Photoelectric: PECooperite = 999.37 barns/electron
U=PECooperite x rElectron Density=7,174.69 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cooperite is Not Radioactive

Cooperite 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
  (02.08.05)Cooperite Group Cooperite (Pt,Pd,Ni)S P 41/mmc 4/m 2/m 2/m Vysotskite (Pd,Ni)S P 41/m 4/m Braggite (Pt,Pd,Ni)S P 41/m 4/m
Help on  Strunz Class: Strunz Class: 02.CC.35a 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.35a Braggite (Pt,Pd,Ni)S P 41/m 4/m
02.CC.35a Cooperite (Pt,Pd,Ni)S P 41/mmc 4/m 2/m 2/m
02.CC.35a Vysotskite (Pd,Ni)S P 41/m 4/m

Other Cooperite 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 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

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Dana No: Strunz No: 02.CC.35a





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