Mineral description : Pentlandite

Pentlandite and pyrrhotite in gabbro from Lainejaur, Sweden.

Mineral class Sulphides : Pyrrhotine - Pentlandite group.

Chemical formula (Ni,Fe)₉S₈

Crystal system Cubic.

Habitus Crystals rare. Often as massive aggregates.

Cleavage None, fracture uneven to conchoidal.

Hardness 3.5-4

Density 4.6-5.2

Color Pale bronce yellow.

Streak Bronce brown.

Luster Metallic.

Description Used as a major nickel ore.

Occurance In basic igneous rocks as gabbro.

Associates Pyrrhotine, cubanite, bravoite and chalcopyrite.

Notes Fuses easily, leaving a led gray bead.

Locations Pentlandite have been mined in a number of mines in Scandinavia.
Sweden :

Lainejaur, Västerbotten.
Los, Slällberg, Kuså and Gaddbo, central Sweden.
Glavagruvan, Småland.

Norway : (to come)

Finland : (to come)

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If you have some questions, suggestions or comments you are welcome to write me a line or two.

axelsson@acc.umu.se

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Last changed : 2001-04-01

Mineral class	Sulphides : Pyrrhotine - Pentlandite group.
Chemical formula	(Ni,Fe)₉S₈
Crystal system	Cubic.
Habitus	Crystals rare. Often as massive aggregates.
Cleavage	None, fracture uneven to conchoidal.
Hardness	3.5-4
Density	4.6-5.2
Color	Pale bronce yellow.
Streak	Bronce brown.
Luster	Metallic.
Description	Used as a major nickel ore.
Occurance	In basic igneous rocks as gabbro.
Associates	Pyrrhotine, cubanite, bravoite and chalcopyrite.
Notes	Fuses easily, leaving a led gray bead.
Locations	Pentlandite have been mined in a number of mines in Scandinavia. Sweden : Lainejaur, Västerbotten. Los, Slällberg, Kuså and Gaddbo, central Sweden. Glavagruvan, Småland. Norway : (to come) Finland : (to come)