Spinel
Andreozzi G B, Princivalle F, Skogby H, Della Giusta A
American Mineralogist 85 (2000) 1164-1171
Cation ordering and structural variations with temperature in
MgAl2O4 spinel: An X-ray single crystal study
Sample: quenched from T = 700 C for 90 days
_database_code_amcsd 0002486
8.0851 8.0851 8.0851 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z   occ  Uiso
Al       .5     .5     .5  .992 .0038
Mg     .125   .125   .125 1.021 .0041
O    .26251 .26251 .26251       .0065