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Ferroericssonite

Named as the Fe2+ analogue of ericssonite. It occurs only at the co-type localities at the Esquire No.7 and Esquire No. 8 claims along Big Creek in California, USA. It crystallizes late in a sequence of minerals that resulted from fluid interaction with quartz-sanbornite veins along the margin of the vein and the country rock. It is associated with anandite, bazirite, celsian, devitoite, quartz, and titantaramellite. It appears as dark red-brown masses composed of irregular, undulating, striated, bladed crystals.

Ref. Kampf, A. R. et al, and The Canadian Mineralogist April 2011 vol. 49 no. 2 587-594

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