Spinel
Martignago F, Dal Negro A, Carbonin S
Physics and Chemistry of Minerals 30 (2003) 401-408
How Cr3+ and Fe3+ affect Mg-Al order-disorder transformation at high temperature
in natural spinels
Sample: L-Fe, 1st run, T = 25 C
_database_code_amcsd 0008810
8.0989 8.0989 8.0989 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z   occ  Uiso
AlT    .125   .125   .125  .126 .0048
FeT    .125   .125   .125  .015 .0048
MgT    .125   .125   .125  .847 .0048
AlM      .5     .5     .5  .894 .0043
FeM      .5     .5     .5 .0335 .0043
MgM      .5     .5     .5 .0715 .0043
O    .26326 .26326 .26326       .0047