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 = 1000 C
_database_code_amcsd 0008824
8.1701 8.1701 8.1701 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
AlT    .125   .125   .125 .277 .0178
FeT    .125   .125   .125 .032 .0178
MgT    .125   .125   .125 .683 .0178
AlM      .5     .5     .5 .817 .0171
FeM      .5     .5     .5 .025 .0171
MgM      .5     .5     .5 .157 .0171
O    .26116 .26116 .26116      .0219