AM_Nepheline_25 Formula: K.716 (Na2.88 Ca.12) Al4 Si4 O16 Name: Nepheline Unit cell: 9.99567 9.99567 8.37777 90.0 90.0 120.0 , V=724.91 Space group: P63 (173)

Antao S M , Hassan I , The Canadian Mineralogist , 48 (2010) p.69-80, Nepheline: structure of three samples from the Bancroft area, Ontario,, obtained using synchrotron high-resolution powder x-ray diffraction, Locality: Egan Chute, Bancroft area, Ontario, Canada, Sample: 1b