This resulted in Alexander von Humboldt rejecting Del RÃo's discovery.
The same element was rediscovered thirty years later in Sweden and renamed as vanadium.
In 1815, a few months before his death, he got the position of director of École des Mines de Paris, in charge of transferring the school to a new building.
He is buried in the 10th Division of the Père Lachaise Cemetery of Paris.