AM_Cordierite_32 Formula: Mg1.542 Fe.588 Al3.99 Si5 O18 Na.066 Name: Cordierite Unit cell: 17.138 9.751 9.328 90.0 90.0 90.0 , V=1558.83 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: 94755, Tincup mining district, Wyoming, T = 900 C, t = 24 h