Origin of erbium
Examples from the Web for erbium
Erbium, a rare metal found along with yttrium, terbium, and other rare elements in some rare minerals.The New Gresham Encyclopedia|Various
(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.Cooley's Practical Receipts, Volume II|Arnold Cooley