Oursinite
Kabatko K A, Burns P C
American Mineralogist 91 (2006) 333-336
A novel arrangement of silicate tetrahedra in the uranyl silicate sheet of
oursinite, (Co0.8Mg0.2)[(UO2)(SiO3OH)]2(H2O)6
_database_code_amcsd 0004122
7.0494 17.550 12.734 90 90 90 Cmca
atom     x      y      z occ   Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Co       0     .5      0  .8  .0218  .0242  .0186  .0225      0      0 -.0014
Mg       0     .5      0  .2  .0218  .0242  .0186  .0225      0      0 -.0014
U        0 .20567 .18049     .01210 .00754  .0177 .01106      0      0  .0007
Si       0  .2991 -.0716      .0140  .0131  .0198  .0091      0      0  .0017
O1       0  .1035  .1685       .023   .020   .015   .034      0      0  -.001
O2       0  .3082  .1944       .022   .030   .023   .014      0      0  -.002
O3       0  .2261  .0060      .0177   .019   .022   .012      0      0  -.001
O4   .1756  .3003 -.1538      .0188   .009   .035   .013  -.001   .001   .003
Oh5      0  .3779  .0016       .022   .034   .017   .017      0      0  -.003
Ow6  .2006  .4979  .1177       .050   .052   .036   .062   .001  -.029  -.013
Ow7     .5  .3998  .1212       .036   .050   .026   .031      0      0   .002
H1       0   .382   .076        .05
H2    .275   .483   .062        .05
H3    .231   .549   .136        .05
H4      .5   .369   .183        .05
H5      .5   .377   .053        .05