AM_Orthoclase_1 Formula: K (Si3 Al) O8 Name: Orthoclase Unit cell: 8.561 12.996 7.192 90.0 116.01 90.0 , V=719.13 Space group: C12/M1 (12)

Colville A A , Ribbe P H , American Mineralogist , 53 (1968) p.25-37, The crystal structure of an adularia and a refinement of the structure of, orthoclase, Spencer C