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: M-Cr, 3rd run, T = 1000 C
_database_code_amcsd 0008794
8.1733 8.1733 8.1733 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z   occ  Uiso
AlT    .125   .125   .125  .267 .0182
MgT    .125   .125   .125  .733 .0182
AlM      .5     .5     .5 .8005 .0170
MgM      .5     .5     .5  .133 .0170
CrM      .5     .5     .5 .0615 .0170
MnM      .5     .5     .5  .001 .0170
ZnM      .5     .5     .5 .0035 .0170
O    .26144 .26144 .26144       .0212