AM_Anorthite Formula: Ca Si2 Al2 O8 Name: Anorthite Unit cell: 8.194 12.897 14.19 92.98 115.82 91.15 , V=1346.52 Space group: P-1 (2)

Foit F F , Peacor D R , American Mineralogist , 58 (1973) p.665-675, The anorthite crystal structure at 410 and 830 C, T = 410 C