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 = 293 K _database_code_amcsd 0001399 8.07975 8.07975 8.07975 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Biso Mg .125 .125 .125 .88 .28 Al .125 .125 .125 .12 .28 Al .5 .5 .5 .94 .51 Mg .5 .5 .5 .06 .51 O .26264 .26264 .26264 .33