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: Sc, annealed at T = 650 C, ordering, t = 120 m
_database_code_amcsd 0004099
8.1174 8.1174 8.1174 90 90 90 *Fd3m
.125 .125 .125
atom       x      y      z  occ
MgT     .125   .125   .125 .843
AlT     .125   .125   .125 .157
AlM       .5     .5     .5 .721
MgM       .5     .5     .5 .157
Cr3+M     .5     .5     .5 .122
O     .26262 .26262 .26262