AM_Mullite_4 Formula: Al2.826 Si.174 O4.588 Name: Mullite Unit cell: 7.7391 7.6108 2.918 90.0 90.0 90.0 , V=171.87 Space group: PBAM (55)

Fischer R X , Schneider H , Schmucker M , American Mineralogist , 79 (1994) p.983-990, Crystal structure of Al-rich mullite