AM_Cancrinite_18 Formula: Na3.01 Ca.75 Si3 Al3 O15.27 C.76 H.99 Name: Cancrinite Unit cell: 12.59 12.59 5.117 90.0 90.0 120.0 , V=702.42 Space group: P63 (173)

Grundy H D , Hassan I , The Canadian Mineralogist , 20 (1982) p.239-251, The crystal structure of a carbonate-rich cancrinite, Note: Si-y coordinate changed to match reported bond lengths