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cooperite

[koo-puh-rahyt]
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noun
  1. a mineral, sulfide and arsenide of platinum, occurring in igneous rocks in the form of steel-gray crystals.

Origin of cooperite

after R. A. Cooper, who described it in 1920; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018