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: H-Cr, 1st run, T = 25 C
_database_code_amcsd 0008795
8.1080 8.1080 8.1080 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z   occ  Uiso
AlT    .125   .125   .125  .114 .0046
MgT    .125   .125   .125  .886 .0046
AlM      .5     .5     .5   .86 .0048
MgM      .5     .5     .5 .0545 .0048
CrM      .5     .5     .5  .081 .0048
MnM      .5     .5     .5  .001 .0048
ZnM      .5     .5     .5 .0035 .0048
O    .26338 .26338 .26338       .0049