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24 de jun. de 2024 · Although the rare earths have been around since the formation of Earth, their existence did not come to light until the late 18th century.In 1787 the Swedish army lieutenant Carl Axel Arrhenius discovered a unique black mineral in a small quarry in Ytterby (a small town near Stockholm). That mineral was a mixture of rare earths, and the first individual element to be isolated was cerium in 1803.
Rare Earth Elements (REE) are becoming increasingly important in electronic devices used in the defense, alternative energy, and communications industries. Minable deposits of REEs are found in only a few locations.
Rare Earth Element Mineral Deposits in the United States; Principal Rare Earth Elements Deposits of the United States—A Summary of Domestic Deposits and a Global Perspective Scientific Investigations Report 2010–5220; Rare Earth Elements—Critical Resources for High Technology FS-087-02; Rare Earth Elements—End Use and Recyclability
Le groupe Rare Earth en 1973. Rare Earth est un groupe rock américain produit par la Motown, qui connut un pic de popularité dans les années 1970.Leurs plus grands succès sont les chansons Get Ready et I Just Want to Celebrate.. Formé en 1967, le groupe est composé uniquement de blancs, ce qui était alors une exception pour Motown, qui les signa sous contrat fin 1968 jusqu'en 1978 [1].
16 de ene. de 2023 · How rare earth elements’ hidden properties make modern technology possible. These 17 metals fine-tune light and generate powerful magnetic fields
1 de feb. de 2019 · Rare earths are characterized by the prevalence of the trivalent oxidation state; however, some electronic configurations stabilize the divalent (Eu II, 4f 7) or the tetravalent (Ce IV, 4f 0) states under ambient conditions. These properties are employed to facilitate the separation of these elements.
Insight: World battles to loosen China's grip on vital rare earths for clean energy transition. 2023-08-02, reuters.com. The world's two biggest rare earths companies outside of China are facing challenges turning rock from their mines into the building blocks for magnets used across the global economy, from Apple's (AAPL.O) iPhone to Tesla's (TSLA.O) Model 3 to Lockheed Martin's (LMT.N) F-35 ...
