AM_Annite_9 Formula: Si2.84 Al Fe2.68 Mg.06 Mn.18 Ti.09 (K.93 Na.07) O11.86 F.14 H1.84 Name: Annite Unit cell: 5.4059 9.3639 10.3235 90.0 100.2 90.0 , V=514.32 Space group: C12/M1 (12)

Redhammer G J , Roth G , American Mineralogist , 87 (2002) p.1464-1476, Single-crystal structure refinements and crystal chemistry of, synthetic trioctahedral micas KM3(Al,Si)4O10(OH)2, where, M = Ni, Mg, Co, Fe, Al, Sample: Ann#1