AM_Muscovite_22 Formula: K.776 Na.181 Ca.011 Al2.726 Fe.03 Mg.02 Si3.15 Ti.02 O11 Name: Muscovite Unit cell: 5.2234 9.179 20.2353 90.0 95.8338 90.0 , V=965.17 Space group: C111 (1)

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, Locality: Goto mine, Nagasaki Prefecture, Japan, Sample: heated