AM_Muscovite-2M1_10 Formula: K.93 Na.01 Si3.2 Al2.53 Ti.02 Fe.16 Mg.16 H.34 O12 Name: Muscovite-2M1 Unit cell: 5.197 9.022 20.076 90.0 95.79 90.0 , V=936.51 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 C3-31b from peraluminous granites at Northern Victoria Land, Antarctica