meionite

noun

mei·​o·​nite

ˈmīəˌnīt

plural -s

: a mineral Ca₄Al₆Si₆O₂₄(SO₄,CO₃,Cl₂) consisting of an aluminosilicate of calcium with other anions (as sulfate, carbonate, and chloride) and being isomorphous with marialite see scapolite

Word History

Etymology

French méionite, from Greek meiōn less + French -ite

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