AM_Senkevichite Formula: Cs.9 K1.08 Na Ca1.62 Mn.3 Fe.06 Ti.93 Nb.04 Si7 O20 H Name: Senkevichite Unit cell: 10.4191 12.2408 7.0569 90.857 99.193 91.895 , V=887.79 Space group: P-1 (2)

Uvarova Y A , Sokolova E , Hawthorne F C , Agakhanov A A , Pautov L A , Karpenko V Y , The Canadian Mineralogist , 44 (2006) p.1341-1348, The crystal chemistry of senkevichite, CsKNaCa2TiO[Si7O18(OH)], from the, Dara-I-Pioz alkaline massif, northern Tajikistan, Locality: Dara-i-Pioz moraine, Alai ridge, Tien-Shan Mountains, Tajikistan