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-Si powder data _database_code_amcsd 0006889 7.5655 7.6883 2.8851 90 90 90 Pbam atom x y z occ Biso AlM 0 0 0 .90 AlT .1488 .3408 .5 .5 .97 SiT .1488 .3408 .5 .33 .97 AlT* .2655 .2069 .5 .17 1.2 Od .1262 .2190 0 1.44 Oab .3583 .4223 .5 1.35 Oc .5 0 .5 .49 1.3 Oc* .449 .051 .5 .17 1.4