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co·lum·bium [kəˈlʌmbiəm] N no pl

Niob nt

English

The hull would have consisted of columbium and nickel alloy. en.wikipedia.org

The production of aquamarine, beryl, niobium (columbium), tantalum, and tourmaline was estimated to have decreased by nearly 14% in 2006. en.wikipedia.org

In addition to tourism the city has mines of niobium (columbium) used in jet engine components, rocket sub-assemblies, and heat-resisting and combustion equipment. en.wikipedia.org

Subsequently, there was considerable confusion over the difference between columbium (niobium) and the closely related tantalum. en.wikipedia.org

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