AM_Muscovite_23 Formula: K.727 Na.17 Ca.01 Al2.752 Fe.03 Mg.022 Si3.128 Ti.02 O12 H2 Name: Muscovite Unit cell: 5.1909 9.0048 20.117 90.0 95.773 90.0 , V=935.56 Space group: C12/C1 (15)

Tomita K , Shiraki K , Kawano M , Clay Science , 10 (1998) p.423-441, Crystal structure of dehydroxylated 2M1 sericite and its relationship with, mixed-layer mica/smectite, Sample: unheated