Ringwoodite
Baur W H
American Mineralogist 57 (1972) 709-731
Computer-simulated crystal structures of observed and hypothetical Mg2SiO4
polymorphs of low and high density
inverse
Locality: hypothetical
_database_code_amcsd 0000279
8.17 8.17 8.17 90 90 90 *Fd3m
.125 .125 .125
atom     x     y     z occ
Si      .5    .5    .5  .5
Mg1     .5    .5    .5  .5
Mg2   .125  .125  .125
O    .2630 .2630 .2630