erbium, a rare metal found along with yttrium, terbium, and other rare elements in some rare minerals.
(c.) Yttria (YO) occurs only in a few rare minerals, and usually in company with terbium and erbium.
A rare metal found by Prof. Mosander, associated with erbium and yttrium in ordinary yttria.
1843, coined in Modern Latin with metallic element name -ium + erbia, name given by Swedish chemist Carl Gustaf Mosander (1797-1858), who discovered it, from second element in Ytterby, name of a town in Sweden where mineral containing it was found.
erbium er·bi·um (ûr'bē-əm)
A soft rare-earth element, used in metallurgy and nuclear research. Atomic number 68; atomic weight 167.26; melting point 1,529°C; boiling point 2,860°C; specific gravity 9.066; valence 3.
A soft, silvery, metallic element of the lanthanide series. It is used as a neutron absorber in nuclear technology and in light amplification for fiber-optic telecommunications. Atomic number 68; atomic weight 167.26; melting point 1,497°C; boiling point 2,900°C; specific gravity 9.051; valence 3. See Periodic Table.