Wadsleyite Kudoh Y, Inoue T Physics and Chemistry of Minerals 26 (1999) 382-388 Mg-vacant structural modules and dilution of the symmetry of hydrous wadsleyite, beta-Mg2-xSiH2xO4 with 0.00<=x<=0.25 Sample: 0.3H-beta _database_code_amcsd 0008218 5.674 11.477 8.235 90 90.21 90 *I2/m .25 .25 .25 atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) MgM1 0 0 0 .98 .55 .0048 .0007 .0023 -.0001 .0003 .0002 MgM2 -.0008 .25 .9689 .94 .37 .0051 .0004 .0009 0 .0000 0 MgM3a .25 .1244 .25 .88 .46 .0042 .0008 .0017 0 .0000 0 MgM3b 3/4 .3755 .25 .84 .56 .0028 .0015 .0018 0 .0002 0 Si -.0004 .1203 .6160 .45 .0038 .0009 .0015 -.0003 -.0003 .0000 O1 .0002 .25 .2226 .56 .0026 .0012 .0026 0 -.0005 0 O2 .0007 .25 .7173 .47 .0004 .0019 .0013 0 .0005 0 O3 .0004 .9875 .2572 1.03 .0118 .0013 .0031 -.0002 -.0007 .0005 O4a .2604 .1231 .9939 .65 .0042 .0011 .0029 .0000 .0002 .0003 O4b .7393 .3767 .9935 .73 .0061 .0017 .0019 -.0001 .0001 .0001