AM_Annite_11 Formula: (K.93 Na.07) Mg1.02 Fe1.41 Ti.46 (Al1.28 Si2.72) O12 Name: Annite Unit cell: 5.3207 9.2099 10.1034 90.0 99.959 90.0 , V=487.64 Space group: C12/M1 (12)

Laurora A , Brigatti M F , Mottana A , Malferrari D , Caprilli E , American Mineralogist , 92 (2007) p.468-480, Crystal chemistry of trioctahedral micas in alkaline and subalkaline volcanic, rocks: A case study from Mt. Sassetto (Tolfa district, Latium, central Italy), Locality: Mt. Sassetto, Tolfa district, Latium, Italy, Sample: MS7, Note: 1M polytype