jdis NIOCALITE, (Ca,Nb)4(Si(O,OH,F)9, LATRAPPITE, (Ca,Na)(Nb,Ti,Fe)O3 & NIOBIAN PEROVSKITE, Oka, Quebec, Canada, 5 x 2.5 x 2.5 cm, | |
Oka is the type locality for Niocalite, which is (Ca,Nb)4(Si(O,OH,F)9. Latrappite is (Ca,Na)(Nb,Ti,Fe)O3 and Niobian Perovskite is The Nb-rich variety of Perovskite. |