AM_Muscovite-2M1_7 Formula: (K.94 Na.06) Si3.08 Al2.75 Ti.06 Fe.06 Mg.08 H.28 O11.96 F.04 Name: Muscovite-2M1 Unit cell: 5.187 9.004 20.036 90.0 95.73 90.0 , V=931.08 Space group: C12/C1 (15)

Brigatti M F , Frigieri P , Poppi L , American Mineralogist , 83 (1998) p.775-785, Crystal chemistry of Mg-, Fe-bearing muscovites-2M1, Sample B1b from peraluminous granites at Northern Victoria Land, Antarctica