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