Ringwoodite
Kudoh Y, Kuribayashi T, Mizobata H, Ohtami E
Physics and Chemistry of Minerals 27 (2000) 474-479
Structure and cation disorder of hydrous ringwoodite,
gamma-Mg1.89Si0.98H0.30O4
_database_code_amcsd 0008430
8.0693 8.0693 8.0693 90 90 90 *Fd3m
.125 .125 .125
atom     x     y     z  occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
MgM     .5    .5    .5  .92  .56  .0071  .0071  .0071 -.0009 -.0009 -.0009
SiM     .5    .5    .5 .025  .56  .0071  .0071  .0071 -.0009 -.0009 -.0009
MgT    1/8   1/8   1/8  .05  .45  .0057  .0057  .0057      0      0      0
SiT    1/8   1/8   1/8  .93  .45  .0057  .0057  .0057      0      0      0
O    .2439 .2439 .2439 .925  .69  .0087  .0087  .0087 -.0003 -.0003 -.0003
OH   .2439 .2439 .2439 .075  .69  .0087  .0087  .0087 -.0003 -.0003 -.0003