chalcophanite

noun

chal·​coph·​a·​nite

kalˈkäfəˌnīt

plural -s

: a mineral (Zn,Mn,Fe)Mn₂O₅.nH₂O consisting of black hydrous manganese and zinc oxide and having a metallic luster

Word History

Etymology

chalc- + phan- (from Greek phainein to show) + -ite; from its change to a copper color when heated

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