AM_Muscovite-2M1_11 Formula: O11.9 (F.1 Na.05) Rb.01 K.94 Si3.08 Al2.86 Fe.07 Li.03 Mg.02 H1.9 Name: Muscovite-2M1 Unit cell: 5.193 9.016 20.114 90.0 95.77 90.0 , V=936.97 Space group: C12/C1 (15)

Brigatti M F , Kile D E , Poppi M , The Canadian Mineralogist , 39 (2001) p.1171-1180, Crystal structure and crystal chemistry of lithium-bearing muscovite-2M1, Sample: 39