AM_Tisinalite Formula: Na6.24 Mn1.26 Ca.38 Ti1.4 Fe.36 Zr.42 Nb.4 Si18 O54 H18 Name: Tisinalite Unit cell: 10.036 10.036 12.876 90.0 90.0 120.0 , V=1123.14 Space group: P11-3 (1)

Yamnova N A , Egorov-Tismenko Y K , Pekov I V , Shchegol kova L V , Crystallography Reports , 48 (2003) p.551-556, Crystal structure of tisinalite Na2(Mn,Ca)1-x(Ti,Zr,Nb,Fe3+)[Si6O8(O,OH)10], Locality: Khibiny massif, Kola Peninsula, Russia