De Marignac

Some articles on de marignac:

Niob - History
... compounds in 1865 and finally by the Swiss chemist Jean Charles Galissard de Marignac in 1866, who all proved that there were only two elements ... De Marignac was the first to prepare the metal in 1864, when he reduced niobium chloride by heating it in an atmosphere of hydrogen ... Although de Marignac was able to produce tantalum-free niobium on a larger scale by 1866, it was not until the early 20th century that niobium was first used commercially ...