fillowite

noun

fil·​low·​ite

ˈfiləˌwīt

plural -s

: a mineral H₂Na₆(Mn,Fe,Ca)₁₄(PO₄)₁₂.H₂O(?) consisting of a brown, yellow, or colorless hydrous phosphate of manganese, iron, sodium, and other metals

Word History

Etymology

A. N. Fillow, 19th century American mine owner + English -ite

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