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: Ga-Ge powder data _database_code_amcsd 0006891 7.8674 8.0305 3.0148 90 90 90 Pbam atom x y z occ Biso GaM 0 0 0 .85 GaT .1498 .3409 .5 .5 .86 GeT .1498 .3409 .5 .345 .86 GaT* .2676 .2123 .5 .155 1.2 Od .1300 .2163 0 1.4 Oab .3645 .4233 .5 1.2 Oc .5 0 .5 .54 2.6 Oc* .441 .049 .5 .15 3.3