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 = 400 C _database_code_amcsd 0004020 8.1399 8.1399 8.1399 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso MgT .125 .125 .125 .721 .0088 AlT .125 .125 .125 .187 .0088 FeT .125 .125 .125 .091 .0088 AlM .5 .5 .5 .807 .0102 MgM .5 .5 .5 .139 .0102 FeM .5 .5 .5 .054 .0102 O .26177 .26177 .26177 .0127