AM_Cordierite_26 Formula: Mg1.976 Fe.054 Al3.976 Si4.994 O18 Na.067 Name: Cordierite Unit cell: 17.071 9.717 9.3479 90.0 90.0 90.0 , V=1550.62 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: 1997-1 SE-India, T = 900 C, t = 24 h, in air