Pyrochlore_4 Formula: Nb2 Ca2 O6 F Name: Pyrochlore Unit cell: 10.428 10.428 10.428 90.0 90.0 90.0 , V=1133.97 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. 3