Dissakisite-(Ce)
Rouse R C, Peacor D R
The Canadian Mineralogist 31 (1993) 153-157
The crystal structure of dissakisite-(Ce),the
Mg analogue of allanite-(Ce)
Locality: Balchen Mountain, East Antartica
_database_code_amcsd 0005294
8.905 5.684 10.113 90 114.62 90 P2_1/m
atom x y z occ Biso
Ca1 .2380 1/4 .8480 0.60
Ce2 .40515 1/4 .57282 .57 .735
La2 .40515 1/4 .57282 .33 .735
Nd2 .40515 1/4 .57282 .07 .735
Pr2 .40515 1/4 .57282 .03 .735
Al1 0 0 0 .83 0.53
Ti1 0 0 0 .17 0.53
Al2 0 0 1/2 0.23
Mg3 .2980 1/4 .2128 .855 0.45
Fe3 .2980 1/4 .2128 .145 0.45
Si1 .6624 1/4 .9609 0.27
Si2 .6859 1/4 .2807 0.25
Si3 .8144 1/4 .6791 0.23
O1 .7647 .0088 .9657 0.45
O2 .6919 .0255 .6400 0.43
O3 .7945 .0138 .3405 0.34
O4 .0508 1/4 .1293 0.43
O5 .9540 1/4 .8503 0.39
O6 .9340 1/4 .5911 0.29
O7 .4886 1/4 .8235 0.54
O8 .5374 1/4 .3293 0.08
O9 .6190 1/4 .1031 0.07
O10 .0821 1/4 .4266 0.05
H .077 1/4 .349 2.00
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Dissakisite-(Ce)
Hoshino M, Kimata M, Nishida N, Shimizu M
Physics and Chemistry of Minerals 35 (2008) 59-70
Crystal chemical significance of chemical zoning in dissakisite-(Ce)
Locality: Trimouns dolomite mine, France
_database_code_amcsd 0009130
8.899 5.6836 10.095 90 114.729 90 P2_1/m
atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
CaA1 .2383 .25 .8479 .998 .0231 .026 .0222 .023 0 .0120 0
LaA2 .40553 .25 .57232 .202 .0202 .0191 .0221 .0180 0 .0065 0
CeA2 .40553 .25 .57232 .349 .0202 .0191 .0221 .0180 0 .0065 0
PrA2 .40553 .25 .57232 .059 .0202 .0191 .0221 .0180 0 .0065 0
NdA2 .40553 .25 .57232 .197 .0202 .0191 .0221 .0180 0 .0065 0
SmA2 .40553 .25 .57232 .035 .0202 .0191 .0221 .0180 0 .0065 0
GdA2 .40553 .25 .57232 .018 .0202 .0191 .0221 .0180 0 .0065 0
CaA2 .40553 .25 .57232 .115 .0202 .0191 .0221 .0180 0 .0065 0
FeA2 .40553 .25 .57232 .025 .0202 .0191 .0221 .0180 0 .0065 0
AlM1 0 0 0 .0201 .019 .020 .020 .001 .006 -.001
AlM2 0 0 .5 .0196 .021 .018 .020 .001 .008 -.000
AlM3 .2962 .25 .2124 .126 .0192 .017 .019 .020 0 .006 0
FeM3 .2962 .25 .2124 .213 .0192 .017 .019 .020 0 .006 0
MgM3 .2962 .25 .2124 .661 .0192 .017 .019 .020 0 .006 0
Si1 .6635 .25 .9604 .0192 .018 .018 .020 0 .007 0
Si2 .6841 .25 .2811 .0186 .018 .019 .018 0 .007 0
Si3 .8155 .25 .6792 .0183 .018 .018 .018 0 .0069 0
O1 .7664 .0086 .9661 .024 .025 .021 .026 .003 .011 .003
O2 .6909 .026 .6381 .024 .025 .023 .022 -.006 .008 -.003
O3 .7931 .0115 .3422 .024 .022 .021 .025 .003 .007 .000
O4 .0512 .25 .1276 .022 .021 .021 .020 0 .007 0
O5 .9534 .25 .8516 .021 .025 .019 .020 0 .010 0
O6 .938 .25 .5922 .022 .023 .020 .022 0 .008 0
O7 .4904 .25 .8239 .021 .020 .024 .021 0 .011 0
O8 .535 .25 .3290 .029 .027 .039 .023 0 .012 0
O9 .617 .25 .1040 .026 .026 .023 .024 0 .008 0
OH10 .0796 .25 .4238 .024 .027 .023 .019 0 .007 0
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