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| ni·o·bi·um [ nī ṓbee əm ] |
noun |
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| Definition: |
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ductile metallic element: a lustrous pale gray ductile metallic element that is a superconductor chemically resembling tantalum. Source: columbite. Use: steel alloys.
Symbol Nb
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| [Mid-19th century. < its association with tantalum, Tantalus being the father of Niobe] |
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