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Descriptor in English: Metals, Rare Earth
Descriptor in Spanish: Metales de Tierras Raras
Descriptor in Portuguese: Metais Terras Raras
Descriptor in French: Terres rares
Entry term(s): Earth Metals, Rare
Rare Earth Metals
Tree number(s): D01.268.558
D01.552.550
Scope note: 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.
Annotation: GEN: prefer specifics
Allowable Qualifiers: AD administration & dosage
AE adverse effects
AG agonists
AI antagonists & inhibitors
AN analysis
BL blood
CF cerebrospinal fluid
CH chemistry
CL classification
CS chemical synthesis
EC economics
HI history
IM immunology
IP isolation & purification
ME metabolism
PD pharmacology
PK pharmacokinetics
PO poisoning
RE radiation effects
SD supply & distribution
ST standards
TO toxicity
TU therapeutic use
UR urine
History Note: 76; was NON MESH before 1976
DeCS UI: 8850
Descriptor UI: D008674
Date Established: 1976/01/01
Date of Entry: 1975/07/23
Revision Date: 2005/07/29
Metals, Rare Earth - Preferred
Concept UI M0013519
Scope note 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.
Preferred term Metals, Rare Earth
Entry term(s) Earth Metals, Rare
Rare Earth Metals



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