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 AVMa8.9
Locality: El Hoyazo, lavas of the Neogene Volcanic Province of SE Spain
_database_code_amcsd 0004918
8.1511 8.1511 8.1511 90 90 90 *Fd3m
.125 .125 .125
atom       x      y      z  occ   Uiso
Fe2+T   .125   .125   .125  .77 .00734
Fe3+T   .125   .125   .125  .01 .00734
AlT     .125   .125   .125  .16 .00734
MgT     .125   .125   .125  .04 .00734
AlM       .5     .5     .5 .894 .00549
Fe2+M     .5     .5     .5 .051 .00549
MgM       .5     .5     .5 .038 .00549
Fe3+M     .5     .5     .5 .021 .00549
O     .26393 .26393 .26393      .01082