2. Rare earths
2.1 Definition
Strictly speaking, the lanthanides are a group of elements made up of the lanthanoids (the elements in the first row of block f), to which lanthanum is added. If we add yttrium and scandium, which are reputed to have similar chemical properties, we obtain the rare earth family (figure 1 ). In practice, the term lanthanide is rarely used
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Rare earths
Optical properties of rare-earth complexes
Bibliography
- (1) - - https://www.alternatives-economiques.fr/pierre-jacquemot/afrique-medicaments-tuent/00091581
- (2) - WERNER (A.) - Beitrag zur Konstitution anorganischer...
Standards and norms
- Chemical analysis of magnesium and its alloys – Rare earth assay – Gravimetric method. - ISO 2355 - 1972
Regulations
Law no. 2020-105 of February 10, 2020 on the fight against waste and the circular economy. Journal Officiel de la République Française, February 11, 2020.
Commission Regulation (EU) 2022/1616 of September 15, 2022 on recycled plastic materials and articles intended to come into contact with foodstuffs and repealing Regulation (EC) No 282/2008. Official Journal of the European Union, L. 243/3....
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