Passer au contenu principal

Medical Subject Headings (thesaurus)

Choisissez le vocabulaire dans lequel chercher

Concept information

Inorganic Chemicals > Elements > Metals, Rare Earth
Inorganic Chemicals > Metals > Metals, Rare Earth

Terme préférentiel

Metals, Rare Earth  

Type

  • mesh:Descriptor

Définition

  • A group of elements that include SCANDIUM; YTTRIUM; and the LANTHANOID SERIES ELEMENTS. Historically, the rare earth metals got their name from the fact that they were never found in their pure elemental form, but as an oxide. In addition, they were very difficult to purify. They are not truly rare and comprise about 25% of the metals in the earth's crust.

Concept générique

Synonyme(s)

  • Rare Earth Metal
  • Rare Earth Metals

Traductions

URI

http://data.loterre.fr/ark:/67375/JVR-JJ4XH3XX-T

Télécharger ce concept :

RDF/XML TURTLE JSON-LD Date de création 23/07/1975, dernière modification le 30/06/2021