Citation: Cannillo, E.; Mazzi, F.; Fang, J. H.; Robinson, P. D.; Ohya, Y. (1971). The crystal structure of aenigmatite sample FRO. American Mineralogist, 56, pp. 427-446.
Formula: Fe5.16 Na2 O20 Si5.74 Ti1.1
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Fe20 O40 Si12 Ti10 (Fe10 O20 Si6 Ti5)
Multiplicity: 1