AM_Anorthoclase_4 Formula: (Al Si3) (Na.85 K.15) O8 Name: Anorthoclase Unit cell: 8.2168 12.9166 7.127 92.754 116.357 90.239 , V=676.72 Space group: C-1 (2)

Harlow G E , American Mineralogist , 67 (1982) p.975-996, The anorthoclase structures: The effects of temperature and composition, Kakanui, Or = 13.8, T = 23 deg C, feldspar