AM_Nepheline_11 Formula: Na.981 Al Si O4 Name: Nepheline Unit cell: 9.9897 9.9622 24.979 90.0 90.0 119.788 , V=2157.43 Space group: P1121 (4)

Vulic P , Kahlenberg V , Konzett J , American Mineralogist , 93 (2008) p.1072-1079, On the existence of a Na-deficient monoclinic trinepheline with composition, Na7.85Al7.85Si8.15O32, Locality: Synthetic