AM_Cordierite_28 Formula: Mg1.75 Fe.266 Al3.984 Si5 O18 Na.074 Name: Cordierite Unit cell: 17.096 9.729 9.342 90.0 90.0 90.0 , V=1553.83 Space group: CCCM (66)

Malcherek T , Domeneghetti M C , Tazzoli V , Ottolini L , McCammon C A , Carpenter M A , American Mineralogist , 86 (2001) p.66-79, Structural properties of ferromagnesian cordierites, Sample: Zimbabwe, T = 900 C, t = 24h