Hercynite
Lavina B, Princivalle F, Della Giusta A
Physics and Chemistry of Minerals 32 (2005) 83-88
Controlled time-temperature oxidation reaction in a synthetic Mg-hercynite
Spinel structure
Sample: Annealing temperature and time T = 600 C, t = 308 h
_database_code_amcsd 0008946
8.1291 8.1291 8.1291 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
AlA    .125   .125   .125  .21 .0084
Fe2+A  .125   .125   .125  .49 .0084
Fe3+A  .125   .125   .125  .10 .0084
MgA    .125   .125   .125  .18 .0084
AlB      .5     .5     .5 .855 .0057
Fe2+B    .5     .5     .5  .04 .0057
Fe3+B    .5     .5     .5  .04 .0057
MgB      .5     .5     .5 .055 .0057
O    .26255 .26255 .26255      .0103