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Cooperite (Cooperit)

Collectors Summary

Color stahlgrau metallisch
Lustre Metallglanz
Hardness (Mohs) 4 - 5
Cleavages {011}
Fracture muschelig
Solubility - Säuren, Königswasser
Crystal System tetragonal, P42/mmc

Chemism

Chemical formula

PtS

Chemical composition

Platin, Schwefel

Unit weight: 227.1437 u; Number of atoms in the formula: 2

Info

Empirical formula:

PtS

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

14.12

1

50.00

32.0655000

32.0655000
Platinum

Pt

85.88

1

50.00

195.0782000

195.0782000

Analysis wt%

Ø Pt : 83.50, Pd : 1.40, Ni : 1.20, S : 14.50, PLT : 84.90 (Ref: American Mineralogist 78)

Strunz 9th edition incl. updates

2.CC.30

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
C: Metallsulfide, M : S = 1 : 1 (und ähnliche)
C: mit Nickel (Ni), Eisen (Fe), Cobalt (Co), usw.
30:Braggit-Gruppe

Lapis Classification

II/C.25-030

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
C: Sulfide mit Metall : S,Se,Te ~ 1:1

Classification by Hölzel

2.CC.150

2: SULFIDES
C: Sulfides (etc) with Me/S=1/1
C: With Pd,Pt, etc. - Coordination Number ~[4], Planar
1: Braggite-Group

Dana 8th edition

02.08.05.01

02: Sulfide Minerals
08: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1
05: Cooperite Group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

stahlgrau metallisch

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Pleochroism

schwach; cremeweiß zu blauweiß

Anisotropism

stark; grüngrau zu weißgelb zu braungrau und braun

Reflectivity: (Lambda nm) ↓, ↑, Ø

(400) 40.90, 46.60, 43.75
(420) 42.00, 47.30, 44.65
(440) 42.60, 47.90, 45.25
(460) 42.70, 48.30, 45.50
(480) 42.20, 48.40, 45.30
(500) 41.50, 48.20, 44.85
(520) 40.40, 47.80, 44.10
(540) 39.40, 47.20, 43.30
(560) 38.50, 46.60, 42.55
(580) 37.80, 46.10, 41.95
(600) 37.20, 45.50, 41.35
(620) 36.60, 45.10, 40.85
(640) 36.00, 44.70, 40.35
(660) 35.60, 44.20, 39.90
(680) 35.10, 43.70, 39.40
(700) 34.60, 43.30, 38.95
Reflection chart Cooperite

Reflectivity Ø

42.63

Crystallography

Crystal System

tetragonal

Class (H-M)

4/mmm

Space Group number

131

Space Group

P42/mmc

Cell parameters a (Å)

3.465

Cell parameters b (Å)

-

Cell parameters c (Å)

6.104

Cell parameters a/b or c/a

1.762

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volumne (ų)

73.286

X-Ray Powder Diffraction

3.013(100),
2.450(60),
1.911(80),
1.753(60),
1.732(50),
1.507(70),
1.231(50),
1.030(40)
XRD chart Cooperite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4 - 5

VHN (Hardness Vickers)

743–1018; Ø 851 (100g)

Density (g/cm³)

10.2 (berechnet) 9.5 (gemessen)

10.293 ( ρ calc. Mineralienatlas )

Cleavages

{011}

Fracture

muschelig

Instability

- Säuren, Königswasser

(Co-)Type locality

(Co-)Type locality

Südafrika/Nordwest (North West), Provinz/Bojanala Platinum, Distrikt/Western Bushveld Complex/Rustenburg/Rustenburg Town & Townlands Mine

Südafrika/Limpopo, Provinz/Eastern Bushveld Complex/Mokopane (Potgietersrus)/Rustenburg Lagerstätte/Rustenburg Town & Townlands Mine

Type material

Natural History Museum, London, England, 1932,1301;

Harvard University, Cambridge, Massachusetts, USA, 101935

Preface

Name from

Der Name ehrt den Südafrikanischen Metallurgen Richard A. Cooper (1890–1972), aus Johannesburg, der das Mineral zuerst beschrieb.

Author (Name, Year)

Wartenweiler, 1928

References

Handbook of Mineralogy (Anthony et al.), 1 (1990), 107

Journal of the Chemical, Metallurgical and Mineralogical Society of South Africa 28, 281-283

Cabri, L.J., Laflamme, J.H.G., Stewart, J.M., Turner, K., and Skinner, B.J. - On cooperite, braggite, and vysotskite. American Mineralogist 63 (1978), 832-839.

Roland K.W. Merkle, Sabine M.C. Verry - Cooperite and braggite from the Bushveld Complex: implications for the miscibility gap and identification - Mineral. Deposita (2003) 38: 381–388 DOI 10.1007/s00126-003-0347-2

Other languages

German

Cooperit

Spanish

Cooperita

English

Cooperite

French

Cooperite

Russian

Куперит

Japanese

硫白金鉱

Traditional Chinese

硫鉑礦

Simplified Chinese

硫铂矿

Alternative Name

Cooperite (of Wartenweiler)

Cooperite (of Wartenweiler)

CNMNC symbol

Symbol

Cpe

Locations with GPS information