AM_Combeite_2 Formula: Na4.4 Ca3.8 Si6 O18 Name: Combeite Unit cell: 10.464 10.464 13.176 90.0 90.0 120.0 , V=1249.42 Space group: P3121 (152)

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