cornwallite

noun

corn·​wall·​ite

ˈkȯrnˌwȯˌlīt,

-wəˌl-

plural -s

: a mineral consisting of a basic copper arsenate Cu₅(AsO₄)₂(OH)₄.H₂O resembling malachite

Word History

Etymology

German cornwallit, from Cornwall, former county in southwest England, its locality + German -it -ite

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