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Cobaltpentlandite

Formula:
(Co,Ni,Fe)
 
9
S
 
8
System:IsometricColour:Yellow
Lustre:MetallicHardness:4 - 4½


Pentlandite Group. Cobaltpentlandite-Pentlandite Series.

Classification of Cobaltpentlandite

IMA status:Approved
Strunz 8th edition ID:2/B.16-20
Nickel-Strunz 10th (pending) edition ID:2.BB.15

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
B : With Ni
Dana 8th edition ID:2.7.1.3

2 : SULFIDES
7 : AmBnXp, with (m+n):p = 9:8
Hey's CIM Ref.:3.10.1

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
10 : Sulphides etc. of Co
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Type Occurrence of Cobaltpentlandite

Type Locality:Varislahti deposit, Southern Karelia, Etelä-Suomen Lääni, Finland
Year of Discovery:1959

Physical Properties of Cobaltpentlandite

Lustre:Metallic
Colour:Yellow
Hardness (Mohs):4 - 4½

Crystallography of Cobaltpentlandite

Crystal System:Isometric
Cell Parameters:a = 9.97Å
Unit Cell Volume:V 991.03 ų (Calculated from Unit Cell)

Optical Data of Cobaltpentlandite

Type:Isotropic

Chemical Properties of Cobaltpentlandite

Formula:
(Co,Ni,Fe)
 
9
S
 
8
Essential elements:Co, S
All elements listed in formula:Co, Fe, Ni, S
Common Impurities:Fe,Ni

Relationship of Cobaltpentlandite to other Species

Series:Forms a series with Pentlandite (see here)
Related Minerals - Nickel-Strunz Grouping):

- +
2.BB.Horomanite
Fe
 
6
Ni
 
3
S
 
8
2.BB.Samaniite
Cu
 
2
Fe
 
5
Ni
 
2
S
 
8
2.BB.05Heazlewoodite
Ni
 
3
S
 
2
2.BB.05Oregonite
Ni
 
2
FeAs
 
2
2.BB.05Vozhminite
(Ni,Co)
 
4
(As,Sb)S
 
2
2.BB.10Arsenohauchecornite
Ni
 
18
Bi
 
3
AsS
 
16
2.BB.10Bismutohauchecornite
Ni
 
9
Bi
 
2
S
 
8
2.BB.10Hauchecornite
Ni
 
9
Bi(Sb,Bi)S
 
8
2.BB.10Tellurohauchecornite
Ni
 
9
Bi(Te,Bi)S
 
8
2.BB.10Tučekite
Ni
 
9
Sb
 
2
S
 
8
2.BB.15Argentopentlandite
Ag(Fe,Ni)
 
8
S
 
8
2.BB.15Geffroyite
(Cu,Fe,Ag)
 
9
(Se,S)
 
8
2.BB.15Godlevskite
(Ni,Fe)
 
9
S
 
8
2.BB.15Kharaelakhite
(Pt,Cu,Pb,Fe,Ni)
 
9
S
 
8
2.BB.15Manganoshadlunite
(Mn,Pb,Cd)(Cu,Fe)
 
8
S
 
8
2.BB.15Pentlandite
(Fe,Ni)
 
9
S
 
8
2.BB.15Shadlunite
(Pb,Cd)(Fe,Cu)
 
8
S
 
8
2.BB.15Sugakiite
Cu(Fe,Ni)
 
8
S
 
8
Related Minerals - Hey's Index Grouping:

- +
3.10.2Linnaeite
Co
2+
 
Co
3+
2
S
 
4
3.10.3Cattierite
CoS
 
2
3.10.4Freboldite
CoSe
3.10.5Bornhardtite
Co
2+
 
Co
3+
2
Se
 
4
3.10.6Trogtalite
CoSe
 
2
3.10.7Hastite
CoSe
 
2
3.10.8Mattagamite
CoTe
 
2
3.10.9Modderite
(Co,Fe)As
3.10.10Safflorite
(Co,Fe,Ni)As
 
2
3.10.11Clinosafflorite
(Co,Fe,Ni)As
 
2
3.10.12Skutterudite
(Co,Fe,Ni)As
 
2-3
3.10.13Cobaltite
CoAsS
3.10.14Paracostibite
CoSbS
3.10.15Costibite
CoSbS
3.10.16Alloclasite
(Co
 
0.65
Fe
 
0.35
)AsS - CoAsS
3.10.17Glaucodot
(Co
 
0.50
Fe
 
0.50
)AsS
3.10.18Carrollite
Cu(Co,Ni)
 
2
S
 
4

Other Names for Cobaltpentlandite

Other Languages:
German:Kobalt-Pentlandit

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Cobaltpentlandite

Reference List:Kuova, O., Huhma, M., and Vuorelainen, Y. (1959) A natural cobalt analog of pentlandite. American Mineralogist: 44: 897-900.

Gellers, S. (1962) Refinement of the crystal structure of Co9S8. Acta Crystallographica: 15: 1195-1198.

Stumpfl, E.F. and Clark, E.M. (1964) A natural occurrence of Co9S8, identified by X-ray microanalysis. Neues Jahrbuch für Mineralogie, Monatshefte 1964: 240-245.

American Mineralogist (1965): 50: 2107.

Petruk, W., Harris, D.C., and Stewart, J.M. (1969) Langisite, a new mineral, and the rare minerals cobalt pentlandite, siegenite, parkerite, and bravoite from the Langis mine, Cobalt-Gowganda area, Ontario, Canada. Canadian Mineralogist: 9: 597-605.

Canadian Mineralogist (1975): 13: 75-78.

Mozgova, N.N., Krasnov, S.G., Batuyev, B.N. Borodaev, Y.S., Efimov, A.V., Markov, V.F., and Stephanova, T.V. (1996) The first report of cobalt pentlandite from a Mid-Atlantic Ridge hydrothermal deposit. Canadian Mineralogist: 34: 23-28.

Internet Links for Cobaltpentlandite

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    Localities for Cobaltpentlandite

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