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 = 25 C _database_code_amcsd 0004018 8.1154 8.1154 8.1154 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Uiso MgT .125 .125 .125 .726 .0041 AlT .125 .125 .125 .182 .0041 FeT .125 .125 .125 .093 .0041 AlM .5 .5 .5 .8085 .0060 MgM .5 .5 .5 .138 .0060 FeM .5 .5 .5 .054 .0060 O .26180 .26180 .26180 .0081