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Hellandite-(Ce) |
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Oberti R, Ottolini L, Camara F, Della Ventura G |
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American Mineralogist 84 (1999) 913-921 |
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Crystal structure of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) |
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and crystal chemistry of the hellandite-group minerals |
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_database_code_amcsd 0002237 |
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19.068 4.745 10.289 90 111.18 90 P2/a |
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atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) |
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B1 .1735 .5271 .4518 .0004 .0049 .0013 .0001 .0003 .0000 |
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B2 .2528 .4618 .1334 .0003 .0044 .0011 .0004 .0003 .0002 |
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Si1 .1040 .4838 .6503 .0003 .0037 .0011 .0001 .0001 -.0001 |
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Si2 .1130 .4980 .1622 .0003 .0065 .0012 -.0001 .0002 .0004 |
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Al1 0 0 0 .83 .0005 .0071 .0020 .0000 .0003 -.0004 |
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Fe1 0 0 0 .65 .0005 .0071 .0020 .0000 .0003 -.0004 |
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Ti1 0 0 0 .41 .0005 .0071 .0020 .0000 .0003 -.0004 |
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Mg1 0 0 0 .11 .0005 .0071 .0020 .0000 .0003 -.0004 |
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Ca2 .0430 .0171 .3609 .70 .0005 .0066 .0017 -.0002 .0003 -.0003 |
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Th2 .0430 .0171 .3609 .06 .0005 .0066 .0017 -.0002 .0003 -.0003 |
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U2 .0430 .0171 .3609 .01 .0005 .0066 .0017 -.0002 .0003 -.0003 |
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Y2 .0430 .0171 .3609 .02 .0005 .0066 .0017 -.0002 .0003 -.0003 |
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La2 .0430 .0171 .3609 .05 .0005 .0066 .0017 -.0002 .0003 -.0003 |
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Ce2 .0430 .0171 .3609 .11 .0005 .0066 .0017 -.0002 .0003 -.0003 |
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Pr2 .0430 .0171 .3609 .01 .0005 .0066 .0017 -.0002 .0003 -.0003 |
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Nd2 .0430 .0171 .3609 .04 .0005 .0066 .0017 -.0002 .0003 -.0003 |
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Ca3 .2476 .0028 .6610 .70 .0007 .0061 .0016 .0000 .0004 -.0002 |
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Th3 .2476 .0028 .6610 .06 .0007 .0061 .0016 .0000 .0004 -.0002 |
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U3 .2476 .0028 .6610 .01 .0007 .0061 .0016 .0000 .0004 -.0002 |
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Y3 .2476 .0028 .6610 .02 .0007 .0061 .0016 .0000 .0004 -.0002 |
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La3 .2476 .0028 .6610 .05 .0007 .0061 .0016 .0000 .0004 -.0002 |
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Ce3 .2476 .0028 .6610 .11 .0007 .0061 .0016 .0000 .0004 -.0002 |
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Pr3 .2476 .0028 .6610 .01 .0007 .0061 .0016 .0000 .0004 -.0002 |
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Nd3 .2476 .0028 .6610 .04 .0007 .0061 .0016 .0000 .0004 -.0002 |
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Ca4 .1567 -.0333 .9312 .70 .0005 .0093 .0022 .0002 .0005 .0004 |
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Th4 .1567 -.0333 .9312 .06 .0005 .0093 .0022 .0002 .0005 .0004 |
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U4 .1567 -.0333 .9312 .01 .0005 .0093 .0022 .0002 .0005 .0004 |
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Y4 .1567 -.0333 .9312 .02 .0005 .0093 .0022 .0002 .0005 .0004 |
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La4 .1567 -.0333 .9312 .05 .0005 .0093 .0022 .0002 .0005 .0004 |
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Ce4 .1567 -.0333 .9312 .11 .0005 .0093 .0022 .0002 .0005 .0004 |
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Pr4 .1567 -.0333 .9312 .01 .0005 .0093 .0022 .0002 .0005 .0004 |
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Nd4 .1567 -.0333 .9312 .04 .0005 .0093 .0022 .0002 .0005 .0004 |
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Be .0373 .5444 .8659 .37 .0010 .0091 .0031 -.0014 .0010 -.0004 |
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Li .0373 .5444 .8659 .12 .0010 .0091 .0031 -.0014 .0010 -.0004 |
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H .0434 .3712 .8889 .25 1.00 |
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O1 .0440 .2445 .5675 .0004 .0075 .0017 -.0007 .0002 -.0006 |
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O2 .1787 .3176 .7582 .0003 .0058 .0018 .0001 .0000 -.0002 |
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O3 .0715 -.3033 .7365 .0006 .0131 .0037 .0008 .0004 -.0033 |
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O4 .1330 -.3339 .5413 .0007 .0059 .0019 -.0001 .0006 .0003 |
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O5 .0370 .1930 .8702 .75 .0007 .0100 .0028 -.0001 .0006 -.0001 |
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F5 .0370 .1930 .8702 .25 .0007 .0100 .0028 -.0001 .0006 -.0001 |
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O6 .2469 -.2427 .8585 .0005 .0045 .0018 .0001 .0003 .0003 |
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O7 .1682 .2313 .4468 .0005 .0034 .0020 -.0003 .0003 -.0004 |
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O8 .1334 .6717 .3092 .0007 .0074 .0016 .0005 .0001 -.0003 |
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O9 .1863 .3251 .1583 .0005 .0076 .0027 .0002 .0006 .0013 |
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O10 .0847 .7267 .0387 .0005 .0182 .0036 .0003 .0003 .0056 |
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O11 .0515 .2578 .1568 .0008 .0206 .0020 -.0022 .0001 .0016 |
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O12 .25 .3368 0 .0012 .0051 .0009 0 .0006 0 |
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O13 .25 .6483 .5 .0003 .0037 .0028 0 .0002 0 |
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