AM_Haineaultite Formula: Na2.52 Ca.25 Ti.925 Nb.2 Si6 O18.49 H7.8 Name: Haineaultite Unit cell: 7.204 23.155 6.953 90.0 90.0 90.0 , V=1159.82 Space group: C222 (21)

McDonald A M , Chao G Y , The Canadian Mineralogist , 42 (2004) p.769-780, Haineaultite, a new hydrated sodium calcium titanosilicate from, Mont Saint-Hilaire, Quebec: Description, structure determination and genetic implications, Locality: Mont Saint-Hilaire, Quebec, Canada