Ringwoodite
Hazen R M, Downs R T, Finger L W
American Mineralogist 78 (1993) 1320-1323
Crystal chemistry of ferromagnesian silicate spinels: Evidence for Mg-Si
disorder
Sample: SUNY 1097
_database_code_amcsd 0001626
8.2030 8.2030 8.2030 90 90 90 *Fd3m
.125 .125 .125
atom     x     y     z occ B(1,1) B(2,2) B(3,3)  B(1,2)  B(1,3)  B(2,3)
Si    .125  .125  .125     .00147 .00147 .00147       0       0       0
Mg      .5    .5    .5 .21 .00180 .00180 .00180  .00001  .00001  .00001
Fe      .5    .5    .5 .79 .00180 .00180 .00180  .00001  .00001  .00001
O    .2415 .2415 .2415     .00209 .00209 .00209 -.00007 -.00007 -.00007