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 = 2.72 GPa, X = .25
_database_code_amcsd 0002446
5.6951 11.4628 8.2515 90 90 90 Imma
atom     x     y     z  occ
Mg1      0     0     0 .712
Fe1      0     0     0 .288
Mg2      0   .25 .9711 .868
Fe2      0   .25 .9711 .132
Mg3    .25 .1254   .25 .710
Fe3    .25 .1254   .25 .290
Si       0 .1209 .6170
O1       0   .25 .2206
O2       0   .25 .7179
O3       0 .9888 .2565
O4   .2633 .1232 .9918