AM_Mullite-Ge Formula: Al2.383 Ge.617 O4.809 Name: Mullite-Ge Unit cell: 7.644 7.76 2.923 90.0 90.0 90.0 , V=173.38 Space group: PBAM (55)

Saalfeld H , Gerlach H , Zeitschrift fur Kristallographie , 195 (1991) p.65-73, Solid solution and optical properties of (Al,Ge)-mullites, Locality: synthetic