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The rare-earth elements (REE), also called the rare-earth metals or rare earths or, in context, rare-earth oxides, and sometimes the lanthanides (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals.
1 de jun. de 2024 · Learn about the 16 rare-earth elements, their discovery, history, and applications in modern technology. Find out why they are not so rare and where they are produced and refined.
Rare earth metals are key ingredients for making the very hard alloys used in armored vehicles and projectiles that shatter upon impact. Substitutes can be used for rare earth elements in some defense applications; however, those substitutes are usually not as effective and that diminishes military superiority.
1 de jul. de 2019 · Rare-earth elements (hereinafter referred to as REE) are a group of seventeen chemical elements in the periodic table, in particular the fifteen lanthanides as well as yttrium and scandium as defined by the International Union of Pure and Applied Chemistry (IUPAC).
A precise definition of rare earth elements (REEs) and in-depth discussion of how common REEs are, worldwide REE production, and current REE production. Portal for information on annual production, price, and use of rare earth elements since 1997, plus links to further information.
16 de ene. de 2023 · Learn how these 17 metals fine-tune light and generate powerful magnetic fields in modern technology. Find out why they are essential for green energy, quantum computing and more, but also face supply risks and environmental concerns.
The boiling points of the rare-earth metals vary by nearly a factor of three. Those of lanthanum, cerium, praseodymium, yttrium, and lutetium are among the highest of all the chemical elements, while those of europium and ytterbium can be placed in the group of metals with the lowest boiling points.
