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Ercitite: Na2(H2O)4[Mn+++2(OH)2(PO4)2]
Comments: Back-scattered electron images of ercitite (medium gray) showing lath-shaped habit and cleavages and splintering on mechanical disturbance. W: whitlockite, F: fairfieldite, C: unidentified. (CanMin, v 38, p 896). Location: Tanco pegmatite, southeastern Manitoba, Canada. Scale: Image size 150 µ-m. © Canadian Mineralogist