AM_Seidite-(Ce) Formula: Si8 Ti.86 Nb.06 Mn.05 Fe.02 Ce.42 La.3 Nd.1 Pr.04 Sm.02 Sr.54 Ca.2 Th.12 Na3.2 K.28 Ba.12 O28.02 F.84 H12.8 Name: Seidite-(Ce) Unit cell: 24.61 7.23 14.53 90.0 94.6 90.0 , V=2577.00 Space group: C12/C1 (15)

Ferraris G , Belluso E , Gula A , Soboleva S V , Khomyakov A P , The Canadian Mineralogist , 41 (2003) p.1183-1192, The crystal structure of seidite-(Ce), Na4(Ce,Sr)2{Ti(OH)2(Si8O18)}(O,OH,F)4.5H2O,, a modular microporous titanosilicate of the rhodesite group