AM_Anorthite_6 Formula: Si2 Al2 Ca O8 Name: Anorthite Unit cell: 8.1796 12.8747 14.172 93.134 115.885 91.236 , V=1338.99 Space group: P-1 (2)

Angel R J , Carpenter M A , Finger L W , American Mineralogist , 75 (1990) p.150-162, Structural variation associated with compositional variation and order-disorder, behavior in anorthite-rich feldspars, sample from Monte Somma