AM_Cordierite_35
Formula: O18 Al4 Si5 Mg1.91 Fe.09 Mn.01 Na.05 Ar.72
Name: Cordierite
Unit cell: 17.069 9.718 9.355 90.0 90.0 90.0 , V=1551.78
Space group: CCCM (66)

Armbruster T , Physics and Chemistry of Minerals , 12 (1985) p.233-245, Ar, N2, CO2 in the structural cavities of cordierite,, an optical and X-ray single-crystal study, Sample: White Well Ar