guildite

noun

guild·​ite

ˈgilˌdīt

plural -s

: a dark chestnut brown mineral (Cu,Fe)₃(Fe,Al)₄(SO₄)₇(OH)₄.15H₂O that is a basic hydrated sulfate of copper and iron

Word History

Etymology

Frank N. Guild †1939 American mineralogist + English -ite

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