Spinel
Redfern S A T, Harrison R J, O'Neill H St C, Wood D R R
American Mineralogist 84 (1999) 299-310
Thermodynamics and kinetics of cation ordering in MgAl2O4 spinel up to 1600 C
from in situ neutron diffraction
Data collected at IPNS, Argonne National Laboratory,
T = 1557 K on cooling cycle, Mg.99Al2O4
_database_code_amcsd 0002183
8.18299 8.18299 8.18299 90 90 90 *Fd3m
.125 .125 .125
atom       x       y       z  occ  Biso
Mg      .125    .125    .125 .700 1.655
Al      .125    .125    .125 .300 1.655
Al        .5      .5      .5 .850 1.392
Mg        .5      .5      .5 .150 1.392
O    .260268 .260268 .260268      1.821