Metavivianite F3(PO4)2(OH)x.(8-x)H2O Triclinic
Description: Metavivianite is a rare phosphate mineral formed by the alteration of vivianite and other phosphate minerals.
RUSK COUNTY: Forms dark to pale green crystals and coating on vivianite from the oxidized zone, Flambeau Mine, near Ladysmith. (Buchholz, pers. com.)
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