• WordNet 3.6
    • n pentlandite a mineral (iron and nickel sulphide) that is the chief ore of nickel
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Century Dictionary and Cyclopedia
    • n pentlandite A sulphid of nickel and iron, occurring in massive forms of a light bronze-yellow color and metallic luster.
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In science:

Tenailleau C, Pring A, Estchmann B et al (2006) Transformation of pentlandite to violarite under mild hydrothermal conditions.
Magnetism, FeS colloids, and Origins of Life