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Surkhobite: KBa3Ca2Na2(Mn, Fe++,Fe+++)16Ti8(Si2O7)8O8(OH)4 (F,O,OH)8
Comments: Small grain of reddish surkhobite. Location: Dara-i-Pioz Glacier, Altai Range, Tajikistan. Scale: Graph Size 1 mm. © Sergey Vasiliev / Systematic Mineralogy