AM_Phlogopite_23 Formula: (Al1.08 Si2.92) (Mg2.66 Fe.34) K O12 H2 Name: Phlogopite Unit cell: 5.3257 9.2254 10.307 90.0 99.926 90.0 , V=498.82 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: A20#2