lepidomelane

noun

lep·​i·​do·​mel·​ane

ˌlepədōˈmeˌlān

plural -s

: a mineral K₂(Fe, Mg)_4–6(Si, Al, Fe)₈O₂₀(OH)₄ consisting of a mica that is a biotite containing ferric iron

Word History

Etymology

German lepidomelan, from lepid- + -melane

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