AM_Siderophyllite_5 Formula: Al2.1 Si2.48 Fe2.12 Mg.06 Mn.12 Ti.03 K.89 Na.04 O11.88 F.1 Cl.02 H1.88 Name: Siderophyllite Unit cell: 5.371 9.302 10.256 90.0 100.25 90.0 , V=504.22 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: Sdp#3