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: Ch, annealed at T = 650 C, ordering, t = 120 m
_database_code_amcsd 0004071
8.0876 8.0876 8.0876 90 90 90 *Fd3m
.125 .125 .125
atom       x      y      z  occ
MgT     .125   .125   .125 .774
AlT     .125   .125   .125 .226
AlM       .5     .5     .5 .759
MgM       .5     .5     .5 .226
Cr3+M     .5     .5     .5 .015
O     .26221 .26221 .26221