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Menezesite |
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Atencio D, Coutinho J M V, Doriguetto A C, Mascarenhas Y P, Ellena J, Ferrari V C |
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American Mineralogist 93 (2008) 81-87 |
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Menezesite, the first natural heteropolyniobate, from Cajati, Sao Paulo, Brazil: |
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description and crystal structure |
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Locality: Jacupiranga mine, Cajati county, Sao Paulo, Brazil |
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_database_code_amcsd 0004492 |
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13.017 13.017 13.017 90 90 90 Im3 |
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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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NbA 0 .1174 .2405 .7683 .036 .0365 .0356 .0371 0 0 -.0016 |
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TaA 0 .1174 .2405 .0300 .036 .0365 .0356 .0371 0 0 -.0016 |
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TiA 0 .1174 .2405 .1917 .036 .0365 .0356 .0371 0 0 -.0016 |
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ZrB .25 .25 .25 .6850 .038 .0383 .0383 .0383 -.0018 -.0018 -.0018 |
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ThB .25 .25 .25 .0775 .038 .0383 .0383 .0383 -.0018 -.0018 -.0018 |
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TiB .25 .25 .25 .2375 .038 .0383 .0383 .0383 -.0018 -.0018 -.0018 |
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FeC 0 .5 0 .0766 .045 .055 .021 .061 0 0 0 |
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MnC 0 .5 0 .0766 .045 .055 .021 .061 0 0 0 |
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MgC 0 .5 0 .3116 .045 .055 .021 .061 0 0 0 |
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BaD 0 0 0 .7399 .032 .0319 .0319 .0319 0 0 0 |
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ThD 0 0 0 .2400 .032 .0319 .0319 .0319 0 0 0 |
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BaE .391 .256 0 .1225 .128 .060 .28 .045 .025 0 0 |
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CaE .391 .256 0 .0258 .128 .060 .28 .045 .025 0 0 |
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KE .391 .256 0 .0442 .128 .060 .28 .045 .025 0 0 |
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O1 .2076 .3899 .3091 .030 .034 .030 .027 .000 -.004 .001 |
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O2 .3402 0 0 .037 .030 .036 .045 0 0 0 |
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O3 .1009 0 .1711 .027 .022 .024 .037 0 .001 0 |
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Wat41 .3824 .3771 0 .5 .033 |
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Wat42 .3581 .4175 0 .5 .027 |
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View JMOL 3-D Structure (permalink) |
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