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 = 596 h
_database_code_amcsd 0008949
8.1076 8.1076 8.1076 90 90 90 *Fd3m
.125 .125 .125
atom      x      y      z  occ  Uiso
AlA    .125   .125   .125  .22 .0083
Fe2+A  .125   .125   .125  .24 .0083
Fe3+A  .125   .125   .125  .27 .0083
MgA    .125   .125   .125  .24 .0083
AlB      .5     .5     .5  .81 .0065
Fe2+B    .5     .5     .5  .04 .0065
Fe3+B    .5     .5     .5  .08 .0065
MgB      .5     .5     .5  .02 .0065
O    .26131 .26131 .26131      .0112