AM_Muscovite_7 Formula: Al1.96 Si3.8 K.94 (O12 H2) Name: Muscovite Unit cell: 5.1805 8.994 20.086 90.0 95.74 90.0 , V=931.18 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: Rietveld refinement (reflection mode)