AM_Alum-(K)_1 Formula: K Al S2 O20 H24 Name: Alum-(K) Unit cell: 12.135 12.135 12.135 90.0 90.0 90.0 , V=1786.98 Space group: PA3 (205)

Nyburg S C , Steed J , Aleksovska S , Petrusevski V M , Acta Crystallographica, Section B , 56 (2000) p.204-209, Structure of the alums. I. On the sulfate group disorder in the alpha-alums, Locality: synthetic, Sample: T = 173 K