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 10 min
_database_code_amcsd 0002834
8.0840 8.0840 8.0840 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
Mg     .125   .125   .125 .750 .0042
Al     .125   .125   .125 .250 .0042
Al       .5     .5     .5 .875 .0039
Mg       .5     .5     .5 .125 .0039
O    .26198 .26198 .26198      .0075