High purity lanthanum oxide can be used to manufacture precision lenses; Lanthanum nickel alloy can be used as a hydrogen storage material, and lanthanum hexaboride is widely used as a high-power electron emission cathode.
Lanthanum was introduced in January 1839 by Carl Gusta at the Karolinska Institute in Stockholm
Discoverer: Carl Tafa Mossande
Discoverer: Carl Tafa Mossande
V Mosander (Karl Tafa Mosander) discovered. He extracted it from cerium already discovered in 1803. Mosander noticed that most of his cerium oxide samples were insoluble, while some were soluble, and he inferred that it was an oxide of a new element. The news of his discovery spread, but Mosander remained surprisingly silent.
The chemical properties of lanthanum metal are active and easily soluble in dilute acids. Easy to oxidize in the air, fresh surfaces quickly darken when exposed to air; Heating can burn and generate oxides and nitrides