AM_Anorthite_8 Formula: Si Al Ca O4 Name: Anorthite Unit cell: 8.178 12.87 14.175 93.17 115.97 91.15 , V=1337.60 Space group: I-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 #115082a