Silver 99.9% Pure Niobium Powder

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Niobium, formerly known as Columbia, is a chemical element with the symbol Nb (Cb above) and atomic number 41. It is a soft transition metal, gray crystalline, ductile, which is often found in pyrochlore and mineral columbite, hence the previous name a columbiuma . Its name derives from Greek mythology, in particular, Niobe, who was the daughter of Tantalus, the homonym of tantalum. The name reflects the great similarity between the two elements in their physical and chemical properties, which makes them difficult to distinguish.

The English chemist Charles Hatchett reported a new element similar to the tantalum in 1801 and called it columbium. In 1809, the British chemist William Hyde Wollaston erroneously concluded that tantalum and niobium were identical. German chemist Heinrich Rose determined in 1846 that the minerals containing tantalum a second element, which he called the niobium. In 1864 and 1865, a series of scientific discoveries made clear that niobium and columbium were the same elements (unlike tantalum), and for a century, both names were used interchangeably. Niobium was officially adopted as the name of the element in 1949, but the name remains columbium current use in metallurgy in the United States.