Lanthanum

La. At. wt. 138.2; sp. gr. 6.1; sp. ht. 044; valence III. Discovered by Mosander 1839. Rare metal, resembling iron in color and luster, found in cerite, lanthanite, and gadolinite. It is cla ed with the metals of the earths, aluminium, oscandium, etc. IMG:content-1015.png:[graphic] Exterior of Lantern, Salamanca Old Cathedral.