dufrenite

noun
du·fre·nite | \d(y)üˈfrāˌnīt\
plural -s

Definition of dufrenite 

: a blackish green mineral Fe5(PO4)3(OH)5.2H2O consisting of hydrous iron phosphate commonly massive or in nodules

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History and Etymology for dufrenite

French dufrénite, from O.P.A. Petit-Dufrénoy †1857 French mineralogist + French -ite

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