Wadsleyite
Hazen R M, Weinberger M B, Yang H, Prewitt C T
American Mineralogist 85 (2000) 770-777
Comparative high-pressure crystal chemistry of wadsleyite,
beta-(Mg_1-xFe_x)2SiO4, with x=0 and 0.25
Sample: P = 8.49 GPa, X = .25
_database_code_amcsd 0002449
5.6485 11.3707 8.1594 90 90 90 Imma
atom     x     y     z  occ
Mg1      0     0     0 .712
Fe1      0     0     0 .288
Mg2      0   .25 .9719 .868
Fe2      0   .25 .9719 .132
Mg3    .25 .1257   .25 .710
Fe3    .25 .1257   .25 .290
Si       0 .1209 .6171
O1       0   .25 .2220
O2       0   .25 .7193
O3       0 .9887 .2542
O4   .2622 .1247 .9924