Pyrochlore (group) [ A2Nb2(O,OH)6Z, A=Na,Ca,SnII,Sr,PbII,SbIII, Y, UIV,H2O,◻; Z=OH,F,O,H2O,◻ ]

Composition

☐, H, Ca, O, F, Na, Pb, Sr, U, Y, Nb, Sb, Sn