Niobium and tantalum are the "twin brother"

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Niobium and tantalum are the "twin brother."

Rare metal tantalum and niobium belong to the same group elements in the periodic table, because of their very similar physical and chemical properties, and they grow together in the same ore body, therefore tantalum and niobium is known as the "twin brother" in the metal. Tantalum Tungsten Alloy.