armangite

noun

ar·​man·​gite

ärˈmanˌgīt,

-aŋˌ-;

ˈärmənˌgīt

plural -s

: a mineral Mn₃(AsO₃)₂ consisting of a manganese arsenite occurring in black rhombohedral crystals

Word History

Etymology

arsenite of manganese + -ite

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