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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. Compounds containing rare ...
On November 30, 2023, the Ministry of National Security of China defined critical minerals [e] as "those irreplaceable metal elements and mineral deposits used in advanced industries, such as new materials, new energy, next-generation information technology, artificial intelligence, biotechnology, edge-cutting equipment manufacturing, national ...
Thus an indication of these minerals being short in supply and allocated their title as 'rare' earth minerals. [4] Many rare-earth minerals include rare-earth elements which thus hold the same significant purpose of rare-earth minerals. [5] Earth's rare minerals have a wide range of purposes, including defense technologies and day-to-day uses. [6]
Rare earth scientists (122 P) Pages in category "Rare earth elements" The following 3 pages are in this category, out of 3 total.
The two are both rare-earth fluorocarbonates, but parisite's formula of Ca(Ce, La, Nd) 2 (CO 3) 3 F 2 contains calcium (and a small amount of neodymium) and a different ratio of constituent ions. Parisite could be viewed as a formula unit of calcite (CaCO 3 ) added to two formula units of bastnäsite.
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All following user names refer to en.wikipedia. 2009-06-27 10:49 Materialscientist 640×416× (175375 bytes) {{Information |Description = These rare-earth oxides are used as tracers to determine which parts of a watershed are eroding.
A study has shown that the elevated rare-earth element concentrations in the bedrock in the Norra Kärr area are particularly well reflected in high contents of these elements in the fern Dryopteris filix-mas. This raises the possibility for the fern species to be used in biogeochemical prospecting. [4]