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 = 500 C, t = 24 h
_database_code_amcsd 0008939
8.1388 8.1388 8.1388 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
AlA    .125   .125   .125  .18 .0073
Fe2+A  .125   .125   .125  .62 .0073
Fe3+A  .125   .125   .125  .02 .0073
MgA    .125   .125   .125  .18 .0073
AlB      .5     .5     .5  .88 .0042
Fe2+B    .5     .5     .5 .045 .0042
Fe3+B    .5     .5     .5  .02 .0042
MgB      .5     .5     .5 .055 .0042
O    .26343 .26343 .26343      .0085