- erbium by Melanie Berry
... the other rare-earth metals. Erbia is a rose-colored oxide of erbium; it has been used to a very limited extent in glazes and glass as a coloring agent. The discovery of erbium is generally credited to Carl G. Mosander, although he did not succeed in isolating the element. In 1843 he separated from gadolinite three oxide fractions that he called yttria, erbia ...
- Erbium by Webster's
... . Its sesquioxide is called erbia.(n.) A metallic element of the rare earth group, found in gadolinite and some other minerals. Symbol, Er; at. wt. 167.4. Its salts are rose-colored and give characteristic spectra.
- terbium by Jesse Jennings
... are used. The pure metal may be produced by chemical reduction of the halide with calcium. The element was discovered in 1843 by C. G. Mosander as its oxide, which he called erbia. The element has been known as terbium since 1877.