Hercynite
Lavina B, Cesare B, Alvarez-Valero A M, Uchida H, Downs R T, Koneva A, Dera P
American Mineralogist 94 (2009) 657-665
Closure temperatures of intracrystalline ordering in anatectic and metamorphic
hercynite, Fe2+Al2O4
Note: Sample HO15
Locality: El Hoyazo, lavas of the Neogene Volcanic Province of SE Spain
_database_code_amcsd 0004920
8.1504 8.1504 8.1504 90 90 90 *Fd3m
.125 .125 .125
atom       x      y      z  occ   Uiso
Fe2+T   .125   .125   .125  .73 .00771
Fe3+T   .125   .125   .125  .02 .00771
AlT     .125   .125   .125  .18 .00771
MgT     .125   .125   .125  .06 .00771
AlM       .5     .5     .5 .875 .00584
Fe2+M     .5     .5     .5 .059 .00584
MgM       .5     .5     .5 .045 .00584
Fe3+M     .5     .5     .5 .015 .00584
TiM       .5     .5     .5 .003 .00584
MnM       .5     .5     .5 .003 .00584
O     .26352 .26352 .26352       .0123