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A natural cobalt analogue of pentlandite

Cobalt-rich pentlandite is associated with Cu and Fe ores at the Outokumpu mine and other localities in northern Finland. The mineral occurs as separate crystals and exsolved lamellae. Chemical and x-ray powder data are given. Optical properties and etch reactions are similar to those of Ni-pentland...

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Bibliographic Details
Published in:The American mineralogist 1959, Vol.44 (7-8), p.897-900
Main Authors: Kouvo, Olavi, Huhma, M, Vuorelainen, Y
Format: Article
Language:English
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Summary:Cobalt-rich pentlandite is associated with Cu and Fe ores at the Outokumpu mine and other localities in northern Finland. The mineral occurs as separate crystals and exsolved lamellae. Chemical and x-ray powder data are given. Optical properties and etch reactions are similar to those of Ni-pentlandite; grinding hardness is slightly lower than pyrrhotite. A bright blue stain is obtained with HNO3 for Co-pentlandite, but a brown stain is obtained for Ni-pentlandite.
ISSN:0003-004X
1945-3027