AM_Cordierite_34 Formula: (Si5.04 Al3.96) (Mg1.36 Fe.64) O18 Name: Cordierite Unit cell: 9.8 9.8 9.345 90.0 90.0 120.0 , V=777.25 Space group: P6/MCC (192)

Meagher E P , Gibbs G V , The Canadian Mineralogist , 15 (1977) p.43-49, The polymorphism of cordierite: II. The crystal structure of indialite