The city of Atlanta, Georgia, in Fulton County, was an important rail and commercial center during the American Civil War. Although relatively small in population, the city became a critical point of contention during the Atlanta Campaign in 1864 when a powerful Union army approached from Union-held Tennessee.
Rare-earth compounds containing lanthanum are extensively used in carbon lighting applications, especially by the motion picture industry for studio lighting and projection.
Atomic Number: 57 Period Number: 6 Group Number: none. Lanthanum, which is the first element of lanthanide series, is a silvery white metal and rare-earth element. Lanthanum can be mainly found in monazite and bastnasite. Although the source of lanthanum is not rare, but the process to get pure material is very complex.