Spinel
Andreozzi G B, Princivalle F
American Mineralogist 87 (2002) 838-844
Kinetics of cation ordering in synthetic MgAl2O4 spinel
Sample: annealed at 1000 deg C for 12h, then isothermally ordered at 700 deg C for 5000 min
_database_code_amcsd 0002846
8.0848 8.0848 8.0848 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
Mg     .125   .125   .125 .790 .0038
Al     .125   .125   .125 .210 .0038
Al       .5     .5     .5 .895 .0037
Mg       .5     .5     .5 .105 .0037
O    .26248 .26248 .26248      .0064