AM_Orthoclase
Formula: K (Si3 Al) O8
Name: Orthoclase
Unit cell: 8.554 12.97 7.207 90.0 116.01 90.0 , V=718.60
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, Note: Spencer B, variety adularia