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 = 356 h
_database_code_amcsd 0008947
8.1198 8.1198 8.1198 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
AlA    .125   .125   .125  .19 .0083
Fe2+A  .125   .125   .125  .36 .0083
Fe3+A  .125   .125   .125  .20 .0083
MgA    .125   .125   .125  .23 .0083
AlB      .5     .5     .5 .845 .0061
Fe2+B    .5     .5     .5  .05 .0061
Fe3+B    .5     .5     .5 .045 .0061
MgB      .5     .5     .5  .03 .0061
O    .26220 .26220 .26220      .0107