AM_Orthoclase_2
Formula: (Si2.98 Al1.02) K O8
Name: Orthoclase
Unit cell: 8.545 12.967 7.201 90.0 116.0 90.0 , V=717.14
Space group: C12/M1 (12)

Phillips M W , Ribbe P H , American Mineralogist , 58 (1973) p.263-270, The structures of monoclinic potassium-rich feldspars, Note: variety adularia