AM_Cordierite_29 Formula: Mg1.62 Fe.404 Al3.976 Si5 O18 Na.052 Name: Cordierite Unit cell: 17.1135 9.7359 9.333 90.0 90.0 90.0 , V=1555.02 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: 85131, Mt. Bity, Madagaskar, T = 900 C, t = 24 h