AM_Tilleyite_1 Formula: Ca5 Si2 C2 O13 Name: Tilleyite Unit cell: 15.025 10.269 7.628 90.0 105.83 90.0 , V=1132.30 Space group: P121/A1 (14)

Smith J V , Acta Crystallographica , 6 (1953) p.9-18, The crystal structure of tilleyite