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 = 1196 h
_database_code_amcsd 0008951
8.0989 8.0989 8.0989 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
AlA    .125   .125   .125  .26 .0085
Fe2+A  .125   .125   .125  .16 .0085
Fe3+A  .125   .125   .125  .32 .0085
MgA    .125   .125   .125  .22 .0085
AlB      .5     .5     .5  .78 .0074
Fe2+B    .5     .5     .5 .025 .0074
Fe3+B    .5     .5     .5 .095 .0074
MgB      .5     .5     .5 .035 .0074
O    .26048 .26048 .26048      .0121