AM_Alum-(Na) Formula: Na Al S2 O20 H24 Name: Alum-(Na) Unit cell: 12.213 12.213 12.213 90.0 90.0 90.0 , V=1821.66 Space group: PA3 (205)

Cromer D T , Kay M I , Larson A C , Acta Crystallographica , 22 (1967) p.182-187, Refinement of the alum structures. II. X-ray and neutron diffraction of, NaAl(SO4)2*12H2O, gamma alum, Locality: synthetic