penroseite

noun

pen·​rose·​ite

ˈpenˌrōˌzīt

plural -s

: a mineral (Ni,Cu,Pb)Se₂ structurally like pyrite consisting of a selenide of lead, copper, and nickel and occurring in lead gray radiating columnar masses (hardness 3, specific gravity 6.9)

Word History

Etymology

Richard A. F. Penrose †1931 American geologist + English -ite

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