The early investigators only isolated the impure metal. The first relatively pure ductile tantalum was produced by von Bolton in 1903.
Tantalum occurs principally in the mineral columbite-tantalite.
Tantalum ores are found in Australia, Brazil, Mozambique, Thailand, Portugal, Nigeria, Zaire, and Canada. Separation of tantalum from niobium requires several complicated steps. Several methods are used to commercially produce the element, including electrolysis of molten potassium fluorotantalate, recduction of potassium fluorotantalate with sodium, or reactng tantalum carbide with tantalum oxide. Twenty five isotopes of tantalum are known to exist. Natural tantalum contains two isotopes.