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: 396a
_database_code_amcsd 0004144
10.4200 10.4200 10.4200 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 .185  .024   .024   .024   .024  .0011  .0011  .0011
K       .5   .5   .5 .010  .024   .024   .024   .024  .0011  .0011  .0011
Ca      .5   .5   .5 .365  .024   .024   .024   .024  .0011  .0011  .0011
Sr      .5   .5   .5 .035  .024   .024   .024   .024  .0011  .0011  .0011
Mn      .5   .5   .5 .020  .024   .024   .024   .024  .0011  .0011  .0011
Pb      .5   .5   .5 .005  .024   .024   .024   .024  .0011  .0011  .0011
La      .5   .5   .5 .005  .024   .024   .024   .024  .0011  .0011  .0011
Ce      .5   .5   .5 .015  .024   .024   .024   .024  .0011  .0011  .0011
Nd      .5   .5   .5 .005  .024   .024   .024   .024  .0011  .0011  .0011
U       .5   .5   .5 .010  .024   .024   .024   .024  .0011  .0011  .0011
Nb       0    0    0 .860 .0198  .0198  .0198  .0198 -.0018 -.0018 -.0018
Ta       0    0    0 .010 .0198  .0198  .0198  .0198 -.0018 -.0018 -.0018
Ti       0    0    0 .080 .0198  .0198  .0198  .0198 -.0018 -.0018 -.0018
Si       0    0    0 .035 .0198  .0198  .0198  .0198 -.0018 -.0018 -.0018
Fe       0    0    0 .015 .0198  .0198  .0198  .0198 -.0018 -.0018 -.0018
O    .3175 .125 .125 .838 .0228   .027   .021   .021      0      0   .008
OH   .3175 .125 .125 .162 .0228   .027   .021   .021      0      0   .008
F     .375 .375 .375  .62  .044   .044   .044   .044      0      0      0
OH    .375 .375 .375  .38  .044   .044   .044   .044      0      0      0