Spinel Martignago F, Andreozzi G B, Dal Negro A American Mineralogist 91 (2006) 306-312 Thermodynamics and kinetics of cation ordering in natural and synthetic Mg(Al,Fe3+)2O4 spinels from in situ high-temperature X-ray diffraction Locality: synthetic Sample: MgFe20, T = 550 C _database_code_amcsd 0004023 8.1520 8.1520 8.1520 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso MgT .125 .125 .125 .725 .0107 AlT .125 .125 .125 .182 .0107 FeT .125 .125 .125 .093 .0107 AlM .5 .5 .5 .8095 .0119 MgM .5 .5 .5 .137 .0119 FeM .5 .5 .5 .053 .0119 O .26179 .26179 .26179 .0145