AM_Mullite Formula: Al2.38 Si.62 O4.77 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 , Prewitt C T , American Mineralogist , 71 (1986) p.1476-1482, Crystal structure of mullite: A re-examination of the average structure