AM_Cordierite_24 Formula: Mg1.614 Fe.432 Al3.962 Si4.992 O18.55 Na.056 H.384 Name: Cordierite Unit cell: 17.0987 9.7388 9.3347 90.0 90.0 90.0 , V=1554.42 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: 85131, Mt Bity, Madagaskar