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Mineralpedia Details for Ferroericssonite

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Ferroericssonite

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

Formula
BaFe2+2Fe3+O(Si2O7)(OH) 
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Ferroericssonite from Esquire #8 claim, Big Creek, Fresno Co., California, United States

Ferroericssonite
            from Esquire #8 claim, Big Creek, Fresno Co., California, United States

Deep reddish brown thin platy or foliated masses to 2mm with Gillespite in Quartz-Sanbornite matrix. Originally found by Robert Walstrom and described by Kampf, A.R., Roberts, Venance, Dunning, and Walstrom, in 2010 in Mineralogical Magazine, 74, 797-800. 

Dark brown foliated and undulating Ferroericssonite with red Gillespite. The Ferroericssonite covers an area approximately 15x8mm and is adjacent to a 8mm wide Gillespite crystal. 

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