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==History==
==History==
Vanadium was actually discovered twice. The first time was in 1801 by a Professor of Mineralogy in Mexico City, named Andrés Manuel del Rio. He found it in a specimen of vanadite, Pb5(VO4)3Cl. The second time vanadium was discovered was in 1831 by the Swedish chemist Nil Gabriel Selfström at Stockholm. He separated it from a sample of cast [[iron]] made from ore.<ref>http://www.rsc.org/periodic-table/element/23/vanadium</ref>
Vanadium was actually discovered twice. The first time was in 1801 by a Professor of Mineralogy in Mexico City, named Andrés Manuel del Rio. He found it in a specimen of vanadite, Pb<sub>5</sub>(VO<sub>4</sub>)<sub>3</sub>Cl. The second time vanadium was discovered was in 1831 by the Swedish chemist Nil Gabriel Selfström at Stockholm. He separated it from a sample of cast [[iron]] made from ore.<ref>http://www.rsc.org/periodic-table/element/23/vanadium</ref>
Henry Roscoe showed that these previous samples of the metal were really vanadium nitride (VN) and produced pure vanadium was in 1869.<ref>http://www.rsc.org/periodic-table/element/23/vanadium</ref>
Henry Roscoe showed that these previous samples of the metal were really vanadium nitride (VN) and produced pure vanadium was in 1869.<ref>http://www.rsc.org/periodic-table/element/23/vanadium</ref>