Abstract:Abstract. Zinkgruvanite, ideally
Ba4Mn42+Fe23+(Si2O7)2(SO4)2O2(OH)2,
is a new member of the ericssonite group, found in Ba-rich drill core
samples from a sphalerite- and galena- and diopside-rich metatuffite succession
from the Zinkgruvan mine, Örebro County, Sweden. Zinkgruvanite is
associated with massive baryte, barytocalcite, diopside and minor witherite,
cerchiaraite-Al, and sulfide minerals. It occurs as subhedral to euhedral
flattened and elongated crystals up to 4 mm. It is almost black and semi-opaque… Show more
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