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.
Lanthanum: geological information. Lanthanum is never found in nature as the free element. Lanthanum is found in the ores monazite sand [(Ce, La, etc.)PO 4 ] and bastnÂ°site [(Ce, La, etc.)(CO 3)F], ores containing small amounts of all the rare earth metals. Other ores include allanite. It is difficult to separate from other rare earth elements.