Citation: Redhammer, G.J.; Beran, A.; Schneider, J.; Lottermoser, W.; 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: Al2.428 Fe2.352 H2 K0.928 O12 Si2.32
Chemical name:K0.928 (Fe2.352 Al0.748) (Al1.68 Si2.32) O10 (O H)2