Niobite

Of mineral.   May also be referred to as columbite.

A black mineral that is an ore of niobium and tantalum.

This concept's ID is @1~74132

Metal

  • niobium 1 facts

    A soft grey ductile metallic element used in alloys; occurs in niobite; formerly called...

  • tantalum 0 facts

    A hard grey lustrous metallic element that is highly resistant to corrosion; occurs in...