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Carbokentbrooksite: (Na,[ ])12(Na,Ce)3Ca6Mn3Zr3Nb(Si25O73)(OH)3(CO3)·H2O
Comments: Orange carbokentbrooksite crystals in matrix. Location: Dara-i-Pioz Glacier, Altai Range, Tajikistan. Scale: Specimen size: 31x25x20 mm. © Sergey Vasiliev / Systematic Mineralogy