Spinel
Princivalle F, Martignago F, Dal Negro A
American Mineralogist 91 (2006) 313-318
Kinetics of cation ordering in natural Mg(Al,Cr3+)2O4 spinels
Locality: Olkhon metamorphic complex, Lake Baikal, Russia
Sample: Ch1, annealed at T = 850 C, ordering, t = 0.50 m
_database_code_amcsd 0004080
8.0908 8.0908 8.0908 90 90 90 *Fd3m
.125 .125 .125
atom       x      y      z   occ
MgT     .125   .125   .125  .745
AlT     .125   .125   .125  .255
AlM       .5     .5     .5 .7165
MgM       .5     .5     .5  .255
Cr3+M     .5     .5     .5 .0285
O     .26180 .26180 .26180