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Carlosbarbosaite |
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Atencio D, Roberts A C, Cooper M A, Menezes L A D, Coutinho J M V, |
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Stirling J A R, Venance K E, Ball N A, Moffatt E, Chaves M L S C, |
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Brandao P R G, Romano A W |
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Mineralogical Magazine 76 (2012) 75-90 |
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Carlosbarbosaite, ideally (UO2)2Nb2O6(OH)2*2H2O, a new hydrated uranyl |
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niobate mineral with tunnels from Jaguaracu, Minas Gerais, Brazil: |
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description and crystal structure |
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Locality: Jaguaracu, Minas Gerais, Brazil |
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_database_code_amcsd 0018664 |
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14.150 10.395 7.529 90 90 90 Cmcm |
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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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U .26634 .27203 .25 .72 .0343 .0279 .0507 .0244 -.0115 0 0 |
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Nb .38296 .5 0 .40 .0281 .0133 .0443 .0267 0 0 -.0001 |
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Ta .38296 .5 0 .26 .0281 .0133 .0443 .0267 0 0 -.0001 |
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Si .38296 .5 0 .13 .0281 .0133 .0443 .0267 0 0 -.0001 |
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Ti .38296 .5 0 .11 .0281 .0133 .0443 .0267 0 0 -.0001 |
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Al .38296 .5 0 .05 .0281 .0133 .0443 .0267 0 0 -.0001 |
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Fe .38296 .5 0 .05 .0281 .0133 .0443 .0267 0 0 -.0001 |
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Ca .5 .0127 .25 .28 .057 .055 .051 .066 0 0 0 |
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Nd .5 .0127 .25 .02 .057 .055 .051 .066 0 0 0 |
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Ce .5 .0127 .25 .02 .057 .055 .051 .066 0 0 0 |
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O(1) .3622 .1709 .25 .061 .097 .062 .023 -.047 0 0 |
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O(2) .1633 .3780 .25 .047 .048 .058 .035 -.000 0 0 |
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O(3) .3020 .3571 -.0398 .035 .026 .052 .027 -.015 -.003 .008 |
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O(4) .3758 .4471 .25 .026 .022 .042 .015 -.001 0 0 |
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OH .5 .6106 .0547 .033 .027 .051 .022 0 0 .003 |
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Wat .5 .126 -.022 .096 .12 .10 .075 0 0 -.001 |
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