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Townendite |
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Grey I E, Macrae C M, Mumme W G, Pring A |
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American Mineralogist 95 (2010) 646-650 |
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Townendite, Na8ZrSi6O18, a new uranium-bearing lovozerite group mineral |
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from the Ilimaussaq alkaline complex, Southern Greenland |
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Locality: the Ilimaussaq alkaline complex, Southern Greenland |
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_database_code_amcsd 0005045 |
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10.345 10.345 13.103 90 90 120 R-3m |
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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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ZrM 0 0 .5 .67 .017 .016 .016 .016 .008 0 0 |
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SnM 0 0 .5 .04 .017 .016 .016 .016 .008 0 0 |
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UM 0 0 .5 .02 .017 .016 .016 .016 .008 0 0 |
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TiM 0 0 .5 .01 .017 .016 .016 .016 .008 0 0 |
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NaA .5 0 0 .026 .024 .039 .020 .020 -.007 -.014 |
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NaB .5 0 .5 .70 .036 .033 .057 .027 .029 .006 .012 |
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NaC 0 0 .2537 .66 .026 .023 .023 .032 .011 0 0 |
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MnC 0 0 .2537 .08 .026 .023 .023 .032 .011 0 0 |
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FeC 0 0 .2537 .06 .026 .023 .023 .032 .011 0 0 |
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YC 0 0 .2537 .07 .026 .023 .023 .032 .011 0 0 |
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CaC 0 0 .2537 .08 .026 .023 .023 .032 .011 0 0 |
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Si .1507 .3013 .0661 .020 .019 .020 .023 .010 -.001 -.002 |
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O1 .2409 .7591 .0645 .041 .034 .034 .062 .023 -.003 .003 |
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O2 .1133 .8867 .1741 .049 .069 .069 .024 .048 .002 -.002 |
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O3 .2546 0 0 .044 .043 .028 .055 .014 .012 .023 |
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