AM_Combeite_3 Formula: Na2.64 Ca1.5 Si3 O9 Name: Combeite Unit cell: 10.429 10.429 13.149 90.0 90.0 120.0 , V=1238.54 Space group: R-3M (166)

Fischer R X , Tillmanns E , Acta Crystallographica, Section C , 43 (1987) p.1852-1854, Revised data for combeite, Na2Ca2Si3O9, Locality: synthetic high-temperature form