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Fluorophlogopite: KMg3(AlSi3)O10F2
Comments: Books of fluorphlogopite from a magnesian skarn showing the basal cleaveage of the micas.. Location: Arebilovskoe phlogopite deposit, Aldan, Aldan Shield, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia. Scale: Specimen size is 3.5x2.5x0.8 cm. © Pavel M. Kartashov