Mullite

Al_2.28O_4.86Si_0.72

Popović, J.Tkalčec, E.Gržeta, B.Kurajica, S.Schmauch, J.

American Mineralogist (2007) 92, 408-411

a=7.5520Å   b=7.6872Å   c=2.8843Å

α=90°   β=90°   γ=90°