Pyrochlore
Perrault G
The Canadian Mineralogist 9 (1968) 383-402
La composition chimique et la structure cristalline du pyrochlore d'Oka, P.Q.
Sample: No. 5
_database_code_amcsd 0005088
10.4205 10.4205 10.4205 90 90 90 Fd3m
atom    x    y    z Biso
Nb    5/8  5/8  5/8 3.03
Ca   .125 .125 .125 3.03
O    .330    0    0 3.03
F       0    0    0 3.03