brucite

noun

bruc·​ite

-ˌsīt,

usually -īt + V

plural -s

: a mineral Mg(OH)₂ consisting of native magnesium hydroxide occurring in thin pearly folia and in fibrous form (hardness 2.5, specific gravity 2.38–2.40)

Word History

Etymology

Archibald Bruce †1818 American mineralogist + English -ite

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