Category:Ytterbium

Yt*ter"bi*um, n. Etym: [nl., fr. Ytterby, in sweden. See erbium.] (chem.)

Defn: a rare element of the boron group, sometimes associated with Yttrium or other related elements, as in euxenite and gadolinite. Symbol yb; provisional atomic weight 173.2. Cf. Yttrium.

Note: ytterbium is associated with other rare elements, and probably Has not been prepared in a pure state.