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seamanite

noun sea·man·ite \ ˈsēməˌnīt \
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Definition of seamanite

plural -s
: 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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Origin and Etymology of seamanite

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

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