Tantalum and niobium minerals ( columbite, tantalite, niobite ) are found in association with spodumene, lepidolite, tourmaline, cassiterite in the massive Greenbushes Pegmatite in the Yilgarn Craton of Western Australia, considered a typical metamorphic pegmatite unassociated with granite.
परिभाषा
a black mineral that is an ore of niobium and tantalum पर्याय: columbite,
मोबाइल