AM_Turkestanite Formula: Th Ca1.4 Na.5 K.53 Si8 O20 Name: Turkestanite Unit cell: 7.5792 7.5792 14.7042 90.0 90.0 90.0 , V=844.67 Space group: P4/MCC (124)

Kabalov Yu K , Sokolova E V , Pautov L A , Schneider J , Crystallography Reports , 43 (1998) p.584-588, Crystal structure of a new mineral turkestanite: a calcium analogue of steacyite, Locality: Dzhelisu massif, Alayskiy range, Tien Shan, Kyrgyzstan, Note: calculated Biso s disagree with reported values, Note: z(O3) adjusted to match reported bond lengths