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 IPNS, Argonne National Laboratory, T = 636 K on heating cycle, Mg.99Al2O4 _database_code_amcsd 0002164 8.11359 8.11359 8.11359 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Biso Mg .125 .125 .125 .830 .602 Al .125 .125 .125 .170 .602 Al .5 .5 .5 .915 .545 Mg .5 .5 .5 .085 .545 O .261666 .261666 .261666 .745