AM_Cordierite_31 Formula: Mg1.45 Fe.581 Al3.976 Si4.993 O18 Na.021 Name: Cordierite Unit cell: 17.132 9.744 9.33 90.0 90.0 90.0 , V=1557.50 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: Great Bear Lake, T = 900 C, t = 24 h