AM_Cordierite_30 Formula: Mg1.582 Fe.453 Al3.974 Si4.991 O18 Na.038 Name: Cordierite Unit cell: 17.119 9.735 9.334 90.0 90.0 90.0 , V=1555.54 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: 1960728 Orijarvi, Finland, T = 900 C, t = 24 h