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 700 deg C for 1000 min _database_code_amcsd 0002845 8.0847 8.0847 8.0847 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso Mg .125 .125 .125 .787 .0045 Al .125 .125 .125 .213 .0045 Al .5 .5 .5 .894 .0044 Mg .5 .5 .5 .106 .0044 O .26245 .26245 .26245 .0070