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Sokolovaite: CsLi2AlSi4O10F2
Comments: BSE images of zoned lepidolite (Lpd) and Cs-dominant rim of sokolovaite (Cs) with albite (Ab). (CanMin, v47:337). Location: Main pegmatite body in the Eastern block of the Moblan pegmatite cluster, located within the Frotet-Evans greenstone belt of the Opatica Subprovince in Quebec, Canada. Scale: See Image. © Canadian Mineralogist