AM_Cordierite_23 Formula: Mg1.604 Fe.424 Al3.972 Si5 O18.5 Na.046 H.168 Name: Cordierite Unit cell: 17.0994 9.7358 9.336 90.0 90.0 90.0 , V=1554.22 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