AM_Aenigmatite_1 Formula: Fe5.16 Ti1.1 Na2 Si5.74 O20 Name: Aenigmatite Unit cell: 10.406 10.813 8.926 104.93 96.87 125.32 , V=744.46 Space group: P-1 (2)

Cannillo E , Mazzi F , Fang J H , Robinson P D , Ohya Y , American Mineralogist , 56 (1971) p.427-446, The crystal structure of aenigmatite, sample FRO