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 = 1073 K _database_code_amcsd 0001406 8.13613 8.13613 8.13613 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Biso Mg .125 .125 .125 .73 0.92 Al .125 .125 .125 .27 0.92 Al .5 .5 .5 .87 1.30 Mg .5 .5 .5 .13 1.30 O .26190 .26190 .26190 1.14