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 HO19
Locality: El Hoyazo, lavas of the Neogene Volcanic Province of SE Spain
_database_code_amcsd 0004917
8.1584 8.1584 8.1584 90 90 90 *Fd3m
.125 .125 .125
atom       x      y      z  occ   Uiso
Fe2+T   .125   .125   .125  .75 .00781
Fe3+T   .125   .125   .125  .01 .00781
AlT     .125   .125   .125  .17 .00781
MgT     .125   .125   .125  .05 .00781
AlM       .5     .5     .5 .897 .00627
Fe2+M     .5     .5     .5 .046 .00627
MgM       .5     .5     .5 .044 .00627
Fe3+M     .5     .5     .5 .013 .00627
O     .26371 .26371 .26371       .0119