AM_Nepheline
Formula: K Na3 Si4 Al4 O16
Name: Nepheline
Unit cell: 10.05 10.05 8.38 90.0 90.0 120.0 , V=733.00
Space group: P63 (173)

Buerger M J , Klein G E , Hamburger G E , American Mineralogist , 32 (1947) p.197-197, The structure of nepheline