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 900 deg C for 4320 min
_database_code_amcsd 0002830
8.0838 8.0838 8.0838 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
Mg     .125   .125   .125 .746 .0045
Al     .125   .125   .125 .254 .0045
Al       .5     .5     .5 .873 .0042
Mg       .5     .5     .5 .127 .0042
O    .26193 .26193 .26193      .0078