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seamanite

noun
sea·​man·​ite | \ ˈsēməˌnīt\
plural -s

Definition of seamanite

: a rare mineral Mn3(PO4)(BO3).3H2O that is a phosphate and borate of manganese and that occurs in pale yellow orthorhombic crystals

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History and Etymology for seamanite

Arthur E. Seaman †1937 American geologist + English -ite

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