AM_Muscovite_6 Formula: Al1.94 Si3.86 K.86 (O12 H2) Name: Muscovite Unit cell: 5.1765 8.9872 20.072 90.0 95.756 90.0 , V=929.09 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 (transmission mode)