AM_Muscovite_20 Formula: K.6 Na.37 Al2.8 Ti.02 Fe.1 Mg.04 Si3.04 O12 H2 Name: Muscovite Unit cell: 5.165 8.964 19.798 90.0 95.4 90.0 , V=912.56 Space group: C12/C1 (15)

Comodi P , Zanazzi P F , Physics and Chemistry of Minerals , 22 (1995) p.170-177, High-pressure structural study of muscovite, Sample: Na-Ms, P = 0.0001 GPa, in air