Spinel Andreozzi G B, Princivalle F American Mineralogist 87 (2002) 838-844 Kinetics of cation ordering in synthetic MgAl2O4 spinel Sample: annealed at 1000 deg C for 12h, then isothermally ordered at 800 deg C for 1440 min _database_code_amcsd 0002838 8.0845 8.0845 8.0845 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso Mg .125 .125 .125 .769 .0043 Al .125 .125 .125 .231 .0043 Al .5 .5 .5 .884 .0042 Mg .5 .5 .5 .116 .0042 O .26222 .26222 .26222 .0072