AM_Muscovite_15 Formula: O11.995 Cl.005 Si3.11 Al2.748 Ti.003 Fe.039 Cr.062 Mg.081 Ba.044 Na.103 K.857 H1.829 Name: Muscovite Unit cell: 5.192 9.011 20.028 90.0 95.74 90.0 , V=932.31 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: Westland