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: 0.5H-beta _database_code_amcsd 0008219 5.675 11.579 8.244 90 90.09 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 .88 .0104 .0006 .0036 .0001 .0012 .0004 MgM2 .0008 .25 .9683 .92 .56 .0071 .0008 .0013 0 .0001 0 MgM3a .25 .1209 .25 .76 .83 .0079 .0016 .0023 0 .0000 0 MgM3b 3/4 .3794 .25 .76 .71 .0064 .0013 .0023 0 .0005 0 Si .0001 .1207 .6156 .84 .0061 .0016 .0033 -.0001 .0001 -.0004 O1 -.0007 .25 .2265 .81 .0027 .0018 .0041 0 -.0019 0 O2 .0033 .25 .7184 .66 .0061 .0014 .0018 0 .0002 0 O3 .0022 .9855 .2580 1.55 .0124 .0029 .0057 .0008 .0014 .0010 O4a .2608 .1242 .9951 .86 .0059 .0017 .0034 -.0015 .0005 -.0002 O4b .7399 .3761 .9942 .82 .0048 .0013 .0042 -.0014 .0008 -.0003