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terbium Article

terbium summary

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Below is the article summary. For the full article, see terbium.

terbium, Chemical element in the lanthanide series, chemical symbol Tb, atomic number 65. It was named after the Swedish town of Ytterby, where it was discovered in 1843. One of the least abundant of the rare earth metals, terbium is silvery white in its metallic form. Terbium occurs in many rare earth minerals but is almost exclusively obtained as a by-product from monazite sands. In certain solid-state devices, terbium is used to dope calcium fluoride, calcium tungstate, and strontium molybdate.