AM_Grossite Formula: Ca Al4 O7 Name: Grossite Unit cell: 12.89 8.88 5.45 90.0 107.05 90.0 , V=596.41 Space group: C12/C1 (15)

Boyko E R , Wisnyi L G , Acta Crystallographica , 11 (1958) p.444-445, The optical properties and structures of CaO*2Al2O3 and SrO*2Al2O3, Locality: synthetic