AM_Cordierite_33 Formula: Mg.988 Fe1.03 Al3.982 Si5 O18 Na.037 Name: Cordierite Unit cell: 17.172 9.766 9.3142 90.0 90.0 90.0 , V=1562.01 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: 111249, Cerro del Hoyazo, Spain, T = 900 C, t = 24 h