AM_Sanidine_6 Formula: K (Al Ge3) O8 Name: Sanidine Unit cell: 8.8163 13.5536 7.4577 90.0 115.898 90.0 , V=801.65 Space group: C12/M1 (12)

Kroll H , Flogel J , Breit U , Lons J , Pentinghaus H , European Journal of Mineralogy , 3 (1991) p.739-749, Order and anti-order in Ge-substituted alkali feldspars, Sample: K[AlGe3O8] synthesized at 600 deg C