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 800 deg C for 5 min
_database_code_amcsd 0002833
8.0836 8.0836 8.0836 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
Mg     .125   .125   .125 .736 .0043
Al     .125   .125   .125 .264 .0043
Al       .5     .5     .5 .868 .0042
Mg       .5     .5     .5 .132 .0042
O    .26181 .26181 .26181      .0072