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
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