Citation: Redhammer, G.J.; Lottermoser, W.; Schneider, J.; Beran, A.; Amthauer, G. (2000). Spectroscopic and structural properties of synthetic micas on the annite-siderophyllite binary: synthesis, crystal structure refinement, Mossbauer, and infrared spectroscopy. American Mineralogist, 85, pp. 449-465.
Formula: Al1.72 Fe2.38 H1.88 K Mg0.11 Mn0.03 O11.88 Si2.55 Ti0.04
Chemical name:K (Fe2.38 Al0.27 Mg0.11 Mn0.03 Ti0.04) (Si2.55 Al1.45) O10 (O H)1.88