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Pentlandite

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Pentlandite
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PentlanditeUSGOV.jpg
Pentlandite
General
CategoryMineral
Chemical formulairon nickel sulfide:(Fe,Ni)9S8
Identification
Color Yellowish bronze
Crystal habit Hexoctahedral rare; massive to granular
Crystal system Isometric
Cleavageabsent - octahedral parting
FractureConchoidal
Mohs Scale hardness 3.5 - 4
Lustermetallic
Refractive indexopaque
Pleochroism N/A
Streak light bronze-brown
Specific gravity 4.6 - 5.0
Fusibility1.5 - 2
Solubility?
Other Characteristicsbecomes magnetic on heating
Major varieties

Pentlandite is a iron-nickel sulfide, (Fe,Ni)9S8. Pentlandite usually has a Ni:Fe ratio of close to 1:1. It also contains minor cobalt.

Pentlandite forms isometric crystals, but 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 is the chief ore of nickel. Typically associated with pyrrhotite, niccolite, biotite, millerite, pyrite, and chalcopyrite Major occurrence is the Sudbury deposit in Ontario, Canada.

References and external links

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