Pyrochlore
Brandenberger E
Zeitschrift fur Kristallographie 76 (1931) 322-334
Die Kristallstruktur des Koppit
_cod_database_code 1011136
_database_code_amcsd 0018025
10.39 10.39 10.39 90 90 90 Fd3m
atom    x    y    z   occ
Na1  .625 .625 .625 .1875
K1   .625 .625 .625  .125
Ca1  .625 .625 .625 .5625
Ce1  .625 .625 .625  .125
Fe1  .125 .125 .125 .1875
Nb1  .125 .125 .125 .8125
O1    .19    0    0
O2     .5   .5   .5  .375
O3     .5   .5   .5  .375
F1     .5   .5   .5   .25