Citation: Geiger, C. A.; Armbruster, T.; Khomenko, V.; Quartieri, S. (2000). Cordierite I: The coordination of Fe2+ Sample: 42/IA. American Mineralogist, 85, pp. 1255-1264.
Formula: Al4 Fe0.164 Mg1.836 Na0.07 O18.59 Si5
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al16 Fe8 Mg8 O72 Si20 (Al4 Fe2 Mg2 O18 Si5)
Multiplicity: 1