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 HO27BC
Locality: El Hoyazo, lavas of the Neogene Volcanic Province of SE Spain
_database_code_amcsd 0004921
8.1474 8.1474 8.1474 90 90 90 *Fd3m
.125 .125 .125
atom       x      y      z  occ   Uiso
Fe2+T   .125   .125   .125  .74 .00723
Fe3+T   .125   .125   .125  .02 .00723
AlT     .125   .125   .125  .16 .00723
MgT     .125   .125   .125  .07 .00723
AlM       .5     .5     .5 .881 .00504
Fe2+M     .5     .5     .5 .046 .00504
MgM       .5     .5     .5 .047 .00504
Fe3+M     .5     .5     .5 .020 .00504
TiM       .5     .5     .5 .002 .00504
MnM       .5     .5     .5 .003 .00504
ZnM       .5     .5     .5 .001 .00504
O     .26385 .26385 .26385       .0106