AM_Mullite_2 Formula: Al2.4 Si.6 O4.8 Name: Mullite Unit cell: 7.5785 7.6817 2.8864 90.0 90.0 90.0 , V=168.03 Space group: PBAM (55)

Angel R J , McMullan R K , Prewitt C T , American Mineralogist , 76 (1991) p.332-342, Substructure and superstructure of mullite by neutron diffraction, Model 2 X-ray