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