AM_Cordierite_16 Formula: Mg2 (Al4.281 Si4.719) O18 Cs.281 Name: Cordierite Unit cell: 9.801 9.801 9.381 90.0 90.0 120.0 , V=780.41 Space group: P6/MCC (192)

Daniels P , American Mineralogist , 77 (1992) p.407-411, Structural effects of the incorporation of large-radius alkalis in high, cordierite