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Tiptopite |
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Peacor D R, Rouse R C, Ahn J-H |
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American Mineralogist 72 (1987) 816-820 |
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Crystal structure of tiptopite, a framework beryllophosphate isotypic with basic |
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cancrinite |
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Note: U(1,2) for OH5 has been altered to match symmetry constraints. |
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_database_code_amcsd 0001111 |
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11.655 11.655 4.692 90 90 120 P6_3 |
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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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P .0851 .4167 .75 .009 .011 .007 .006 .007 .006 |
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Be .338 .418 .746 .007 .012 .009 .003 -.003 -.017 |
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O1 .1902 .3843 .6518 .016 .012 .017 .006 .003 .001 |
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O2 .1378 .5647 .7027 .015 .011 .009 .005 -.004 -.008 |
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O3 .0547 .3801 .0688 .018 .022 .008 .009 .006 .000 |
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O4 .3302 .3741 .0862 .013 .016 .009 .010 -.002 -.004 |
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K1 1/3 2/3 .253 .044 .044 .019 .022 0 0 |
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Li2 .2207 .1137 .7486 .48 .051 .036 .036 .026 .003 -.010 |
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Na2 .2207 .1137 .7486 .28 .051 .036 .036 .026 .003 -.010 |
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Ca2 .2207 .1137 .7486 .12 .051 .036 .036 .026 .003 -.010 |
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OH5 0 0 .253 .009 .009 .090 .0045 0 0 |
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OH6 .064 .130 .378 .25 .02 |
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OH7 .066 .130 .097 .25 .02 |
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OH8 .168 .322 .236 .17 .02 |
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