niobium

element 41|columbium|Columbite

Niobium

chemical element with symbol Nb and atomic number 41

Niobium crystals and 1cm3 cube.jpg

Cb

Chemical element with atomic number 41 (Nb)

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Niobium is a chemical element; it has symbol Nb and atomic number 41. It is a light grey, crystalline transition metal. Pure niobium has a Mohs hardness rating similar to pure titanium, and it has similar ductility to iron. Niobium oxidizes in Earth's atmosphere very slowly, hence its application in jewelry as a hypoallergenic alternative to nickel. Niobium is found in the minerals pyrochlore and columbite, as well as other minerals. Its name comes from Greek mythology: Niobe, daughter of Tantalus, the namesake of tantalum. The name reflects the great similarity between the two elements in their physical and chemical properties, which makes them difficult to distinguish.

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Niobium

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