THALINITE-Y Y3Si3O10(F,OH) Monoclinic

Description: Thalenite-Y is a rare mineral found as pinkish, greenish or brownish grains in complex pegmatites.

MARATHON COUNTY: Thalenite-Y has been documented as occurring as rare grains in pegmatites in the Koss Pit, a large "rotten granite" quarry in the SW sec. 2 T.27N. R.5E. (Buchholz et. al., 200).

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