AM_Annite_3 Formula: Si2.64 Al1.64 Fe2.68 K.96 O12 Name: Annite Unit cell: 5.3812 9.3234 10.2934 90.0 100.22 90.0 , V=508.24 Space group: C12/M1 (12)

Redhammer G J , Beran A , Schneider J , Amthauer G , Lottermoser W , American Mineralogist , 85 (2000) p.449-465, Spectroscopic and structural properties of synthetic micas on the, annite-siderophyllite binary: Synthesis, crystal structure refinement,, Mossbauer, and infrared spectroscopy, Sample: sd37no.10