AM_Annite_4 Formula: Si2.592 Al1.912 Fe2.568 K.936 O12 Name: Annite Unit cell: 5.3732 9.3097 10.2807 90.0 100.24 90.0 , V=506.08 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: sd50no.10