AM_Muscovite_16 Formula: O11.969 F.031 Si3.069 Al2.774 Ti.019 Fe.021 Cr.099 Mg.02 Ca.004 Na.268 K.725 H1.92 Name: Muscovite Unit cell: 5.175 8.979 19.915 90.0 95.66 90.0 , V=920.87 Space group: C12/C1 (15)

Brigatti M F , Galli E , Medici L , Poppi L , Cibin G , Marcelli A , Mottana A , European Journal of Mineralogy , 13 (2001) p.377-389, Chromium-containing muscovite: crystal chemistry and XANES spectroscopy, Locality: Northwest Nelson - Campbell Creek