Spinel Redfern S A T, Harrison R J, O'Neill H St C, Wood D R R American Mineralogist 84 (1999) 299-310 Thermodynamics and kinetics of cation ordering in MgAl2O4 spinel up to 1600 C from in situ neutron diffraction Data collected at ISIS, Rutherford Appleton Laboratory, U.K. T = 673 K on heating cycle, MgAl2O4 _database_code_amcsd 0002146 8.11009 8.11009 8.11009 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Biso Mg .125 .125 .125 .845 .836 Al .125 .125 .125 .155 .836 Al .5 .5 .5 .9225 .575 Mg .5 .5 .5 .0775 .575 O .261981 .261981 .261981 .865