Nickel's most important modern ore minerals are laterites, including limonite, garnierite, and pentlandite.
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The nickel-copper sulphide occurrences include disseminated, net textured and massive sulphides, comprised dominantly of pyrrhotite with accessory pentlandite and chalcopyrite.
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Small but commercially important quantities are also found in pentlandite extracted from Sudbury, Ontario, Canada, and in pyroxenite deposits in South Africa.
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A mineral (iron and nickel sulphide) that is the chief ore of nickel
Pentlandite is an iron-nickel sulfide, (Fe,Ni)9S8. Pentlandite usually has a Ni:Fe ratio of close to 1:1. It also contains minor cobalt.
Fe-Ni sulfide, (Fe,Ni)9S8, often associated with troilite, found in the matrix and chondrules of CO, CV, CK and CR chondrites.