AM_Brownmillerite_9 Formula: Ca2 (Fe1.41 Al.59) O5 Name: Brownmillerite Unit cell: 5.3832 14.6214 5.5916 90.0 90.0 90.0 , V=440.11 Space group: I2MB (46)

Redhammer G J , Tippelt G , Roth G , Amthauer G , American Mineralogist , 89 (2004) p.405-420, Structural variations in the brownmillerite series Ca2(Fe2-xAlx)O5:, Single-crystal X-ray diffraction at 25 deg C and high temperature, X-ray powder diffraction (25 C <= T <= 1000 C)