Spinel Peterson R C, Lager G A, Hitterman R L American Mineralogist 76 (1991) 1455-1458 A time-of-flight neutron powder diffraction study of MgAl2O4 at temperatures up to 1273 K sample UC, T = 1173 K _database_code_amcsd 0001409 8.14369 8.14369 8.14369 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Biso Mg .125 .125 .125 .69 1.06 Al .125 .125 .125 .31 1.06 Al .5 .5 .5 .85 1.45 Mg .5 .5 .5 .15 1.45 O .26164 .26164 .26164 1.25