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 441A
Locality: the Anga metamorphic complex, Lake Baikal, Russia
_database_code_amcsd 0004922
8.1460 8.1460 8.1460 90 90 90 *Fd3m
.125 .125 .125
atom       x      y      z  occ   Uiso
Fe2+T   .125   .125   .125  .77 .00633
Fe3+T   .125   .125   .125  .01 .00633
AlT     .125   .125   .125  .11 .00633
MgT     .125   .125   .125  .10 .00633
AlM       .5     .5     .5 .928  .0044
Fe2+M     .5     .5     .5 .019  .0044
MgM       .5     .5     .5 .045  .0044
Fe3+M     .5     .5     .5 .011  .0044
O     .26471 .26471 .26471       .0071