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 = 212 h
_database_code_amcsd 0008942
8.1380 8.1380 8.1380 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
AlA    .125   .125   .125  .17 .0080
Fe2+A  .125   .125   .125  .61 .0080
Fe3+A  .125   .125   .125  .02 .0080
MgA    .125   .125   .125  .20 .0080
AlB      .5     .5     .5  .89 .0050
Fe2+B    .5     .5     .5 .045 .0050
Fe3+B    .5     .5     .5  .02 .0050
MgB      .5     .5     .5 .045 .0050
O    .26360 .26360 .26360      .0087