AM_Muscovite_8
Formula: Al1.93 Si3.772 K.894 (O12 H2)
Name: Muscovite
Unit cell: 5.18 8.993 20.069 90.0 95.69 90.0 , V=930.28
Space group: C12/C1 (15)

Liang J , Hawthorne F C , The Canadian Mineralogist , 34 (1996) p.115-122, Rietveld refinement of micaceous materials: muscovite-2M1, a comparison, with single-crystal structure refinement, Sample: single-crystal refinement