Terre rare - Wikipedia
Secondo la definizione della IUPAC, le terre rare (in inglese rare-earth elements o rare-earth metals) sono un gruppo di 17 elementi chimici della tavola periodica, precisamente scandio, ittrio e i lantanoidi [1].
Terre rare — Wikipédia
Les terres rares, de symbole REE (pour l'anglais rare-earth element), sont un groupe de métaux aux propriétés voisines comprenant le scandium 21 Sc, l'yttrium 39 Y et les quinze lanthanides. Ces métaux sont, contrairement à ce que suggère leur appellation, assez répandus dans la croûte terrestre, à l'égal de certains métaux usuels.
Rare-earth element - Wikipedia
The rare-earth elements (REE), also called the rare-earth metals or rare earths, and sometimes the lanthanides or lanthanoids (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), [1] are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals.
What are rare earth elements, and why are they important?
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.
Why are rare earth elements so rare? - Live Science
Oct 1, 2023 · There are 17 rare earth elements on the periodic table, but a better name for them would be the "troublesome earths." Here's why.
Rare-earth element | Uses, Properties, & Facts | Britannica
Sep 26, 2024 · Rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 (scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body of the periodic table (cerium [Ce] through lutetium [Lu]).
Rare Earths Statistics and Information | U.S. Geological Survey - USGS.gov
Statistics and information on the worldwide supply of, demand for, and flow of the mineral commodity group rare earths - scandium, yttrium, and the lanthanides. The principal economic sources of rare earths are the minerals bastnasite, monazite, and loparite and the lateritic ion-adsorption clays.
Geologists Solve Crucial Mystery Surrounding The Deposits of Rare …
Oct 12, 2020 · In a new study led by geologist Michael Anenburg from Australian National University, researchers wanted to explore the chemical mechanisms by which REEs form under the surface, specifically in and around the igneous …
REE - Rare Earth Elements - Metals, Minerals, Mining, Uses - Geology.com
What Are Rare Earth Elements (REEs)? Rare earth elements are a group of seventeen chemical elements that occur together in the periodic table (see image).
Rare earth elements: A review of applications, occurrence, …
Jul 1, 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).