AM_Illite
Formula: K Al2 Si4 O12 H2
Name: Illite
Unit cell: 5.2021 8.9797 10.226 90.0 101.57 90.0 , V=467.98
Space group: C12/M1 (12)

Drits V A , Zviagina B B , McCarty D K , Salyn A L , American Mineralogist , 95 (2010) p.348-361, Factors responsible for crystal-chemical variations in the solid solutions, from illite to aluminoceladonite and from glauconite to celadonite, Locality: Silver caldera, San Juan Mountains, Colorado, Sample Name: RM30