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, 3rd run, T = 900 C
_database_code_amcsd 0008823
8.1627 8.1627 8.1627 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z   occ  Uiso
AlT    .125   .125   .125  .263 .0163
FeT    .125   .125   .125  .034 .0163
MgT    .125   .125   .125  .695 .0163
AlM      .5     .5     .5 .8245 .0160
FeM      .5     .5     .5  .024 .0160
MgM      .5     .5     .5   .15 .0160
O    .26133 .26133 .26133       .0199