Formula: Fe3(PO4)2(OH)2.6H2O 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. (T. Buchholz, pers. comm.)