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 40 min _database_code_amcsd 0002836 8.0844 8.0844 8.0844 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso Mg .125 .125 .125 .767 .0042 Al .125 .125 .125 .233 .0042 Al .5 .5 .5 .884 .0039 Mg .5 .5 .5 .116 .0039 O .26220 .26220 .26220 .0072