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 = 860 h
_database_code_amcsd 0008950
8.1045 8.1045 8.1045 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
AlA    .125   .125   .125  .23 .0088
Fe2+A  .125   .125   .125  .22 .0088
Fe3+A  .125   .125   .125  .28 .0088
MgA    .125   .125   .125  .24 .0088
AlB      .5     .5     .5 .805 .0075
Fe2+B    .5     .5     .5 .035 .0075
Fe3+B    .5     .5     .5 .085 .0075
MgB      .5     .5     .5 .025 .0075
O    .26078 .26078 .26078      .0119