Discovery: Swedish chemist Carl Gustaf Mosander extracted lanthanum oxide, or lanthana, from an impure cerium nitrate in 1839. In 1923, a relatively pure form of lanthanum was isolated.

Cerium Oxide Nanotubes Get Noticed Date: March 30, 2006 Source: Brookhaven National Laboratory Summary: Chemists and materials scientists often study "nanotubes" -- capsule-shaped molecules only a ...

It was discovered in 1839 when it was extracted from impure cerium nitrate. In 1929, it was isolated in its pure form.