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Pentlandite

A species of Minerals, Also known as Horbachite, Lillhammerite

Pentlandite is an iron–nickel sulfide, (Fe,Ni)9S8. Pentlandite has a narrow variation range in Ni:Fe but it is usually described as having a Ni:Fe of 1:1. It also contains minor cobalt, usually at low levels as a fraction of weight. Pentlandite forms isometric crystals, but it is normally found in massive granular aggregates. It is brittle with a hardness of 3.5–4 and specific gravity of 4.6–5.0 and is non-magnetic. It has a yellowish bronze color. Pentlandite has been investigated as a catalyst for the hydrogen evolution reaction in water electrolysis.

Hardness:

3.5 - 4

Density:

4.956 g/cm³

General Info About Pentlandite

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Physical Properties of Pentlandite

Colors

Pale bronze-yellow; bronze; brown; reddish brown when argentian

Streak

Pale bronze-brown

Hardness

3.5 - 4 , Soft

Density

4.956 g/cm³, Obviously Heavy Weight

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Chemical Properties of Pentlandite

Formula

(Fe,Ni)₉S₈

Elements listed

Fe, Ni, S

Common Impurities

Co,Ag,Cu

Characteristics of Pentlandite

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Formation of Pentlandite

Pentlandite is found within the lower margins of mineralised layered intrusions, the best examples being the Bushveld igneous complex, South Africa, the Voiseys Bay troctolite intrusive complex in Canada, the Duluth gabbro, in North America, and various other localities throughout the world. In these locations it forms an important nickel ore. Pentlandite is also the principal ore mineral won from Kambalda type komatiitic nickel ore deposits, the type examples of which are in the Yilgarn Craton of Western Australia. Similar deposits exist at Nkomati, Namibia, in the Thompson Belt, Canada, and a few examples from Brazil. Pentlandite, but primarily chalcopyrite and PGEs, are also obtained from the supergiant Norilsk nickel deposit, in trans-Siberian Russia. The Sudbury Basin in Ontario, Canada, is associated with a large meteorite impact crater. The pentlandite-chalcopyrite-pyrrhotite ore around the Sudbury Structure formed from sulfide melts that segregated from the melt sheet produced by the impact.

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