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 = .00 _database_code_amcsd 0002440 5.6731 11.4114 8.2067 90 90 90 Imma atom x y z Mg1 0 0 0 Mg2 0 .25 .9708 Mg3 .25 .1274 .25 Si 0 .1201 .6170 O1 0 .25 .2197 O2 0 .25 .7162 O3 0 .9890 .2557 O4 .2597 .1216 .9928