RAREEARTHELEMENT

Rare earth element

As defined by IUPAC, a rare earth element or rare earth metal is one of a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides plus scandium and yttrium. Scandium and yttrium are considered rare earth elements since they tend to occur in the same ore deposits as the lanthanides and exhibit similar chemical properties.

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rare earth element

Noun

  1. Any of a group of seventeen soft, lustrous, sometimes magnetic metals that form trivalent salts; they include the lanthanides plus yttrium, scandium, thorium and sometimes zirconium.


The above text is a snippet from Wiktionary: rare earth element
and as such is available under the Creative Commons Attribution/Share-Alike License.

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