pentlandite

[pent-luhn-dahyt]
noun
a mineral, sulfide of nickel, occurring in the form of bronze-colored granular aggregates, found with pyrrhotite: the principal source of nickel.

Origin:
1855–60; < French; named after Joseph B. Pentland (died 1873), Irish scientist; see -ite1

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World English Dictionary
pentlandite (ˈpɛntlənˌdaɪt)
 
n
a brownish-yellow mineral consisting of an iron and nickel sulphide in cubic crystalline form: the principal ore of nickel. Formula: (Fe,Ni)S
 
[C19: from French; named after J. B. Pentland (1797--1873), Irish scientist who discovered it]

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Encyclopedia Britannica
Encyclopedia

pentlandite

a nickel and iron sulfide mineral, the chief source of nickel. It is nearly always found with pyrrhotite and similar minerals in silica-poor rocks such as those at Bushveld, S.Af.; Bodo, Nor.; and Sudbury, Ont., Can. It has also been found in meteorites. Pentlandite forms crystals that have isometric symmetry. For chemical formula and detailed physical properties, see sulfide mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The economic minerals are predominately pentlandite and chalcopyrite.
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