Pyrochlore_6 Formula: Nb2 Ca2 O6 F Name: Pyrochlore Unit cell: 10.4205 10.4205 10.4205 90.0 90.0 90.0 , V=1131.53 Space group: FD3M (227)
Perrault G , The Canadian Mineralogist , 9 (1968) p.383-402, La composition chimique et la structure cristalline du pyrochlore d Oka, P.Q., Sample: No. 5