Pyrochlore
Bonazzi P, Bindi L, Zoppi M, Capitani G C, Olmi F
American Mineralogist 91 (2006) 794-801
Single-crystal diffraction and transmission electron microscopy studies
of "silicified" pyrochlore from Narssarssk, Julianehaab district, Greenland
Locality: Narssarssk, Julianehaab district, Greenland
Sample: 170a
_database_code_amcsd 0004145
10.3738 10.3738 10.3738 90 90 90 *Fd-3m
.125 .125 .125
atom     x    y    z  occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Na      .5   .5   .5 .090  .026   .026   .026   .026  .0053  .0053  .0053
K       .5   .5   .5 .025  .026   .026   .026   .026  .0053  .0053  .0053
Ca      .5   .5   .5 .360  .026   .026   .026   .026  .0053  .0053  .0053
Sr      .5   .5   .5 .040  .026   .026   .026   .026  .0053  .0053  .0053
Mn      .5   .5   .5 .020  .026   .026   .026   .026  .0053  .0053  .0053
Pb      .5   .5   .5 .005  .026   .026   .026   .026  .0053  .0053  .0053
La      .5   .5   .5 .005  .026   .026   .026   .026  .0053  .0053  .0053
Ce      .5   .5   .5 .020  .026   .026   .026   .026  .0053  .0053  .0053
Nd      .5   .5   .5 .005  .026   .026   .026   .026  .0053  .0053  .0053
U       .5   .5   .5 .010  .026   .026   .026   .026  .0053  .0053  .0053
Nb       0    0    0 .740 .0225  .0225  .0225  .0225 -.0017 -.0017 -.0017
Ta       0    0    0 .020 .0225  .0225  .0225  .0225 -.0017 -.0017 -.0017
Ti       0    0    0 .080 .0225  .0225  .0225  .0225 -.0017 -.0017 -.0017
Si       0    0    0 .120 .0225  .0225  .0225  .0225 -.0017 -.0017 -.0017
Fe       0    0    0 .040 .0225  .0225  .0225  .0225 -.0017 -.0017 -.0017
O    .3173 .125 .125 .772  .028   .029   .028   .028      0      0   .011
OH   .3173 .125 .125 .228  .028   .029   .028   .028      0      0   .011
F     .375 .375 .375 .460  .031   .031   .026   .026      0      0      0
OH    .375 .375 .375 .540  .031   .031   .031   .031      0      0      0