Mullite Voll D, Lengauer C, Beran A, Schneider H European Journal of Mineralogy 13 (2001) 591-604 Infrared band assignment and structural refinement of Al-Si, Al-Ge, and Ga-Ge mullites Sample: Al-Ge powder data _database_code_amcsd 0006890 7.6530 7.7779 2.9252 90 90 90 Pbam atom x y z occ Biso AlM 0 0 0 .91 AlT .1500 .3391 .5 .5 .98 GeT .1500 .3391 .5 .32 .98 AlT* .2701 .2036 .5 .18 .9 Od .1287 .2128 0 1.42 Oab .3631 .4208 .5 1.42 Oc .5 0 .5 .46 1.7 Oc* .452 .047 .5 .18 1.0