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 900 deg C for 2 min _database_code_amcsd 0002827 8.0836 8.0836 8.0836 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso Mg .125 .125 .125 .740 .0040 Al .125 .125 .125 .260 .0040 Al .5 .5 .5 .870 .0041 Mg .5 .5 .5 .130 .0041 O .26186 .26186 .26186 .0076