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Rare-earth ore, shown with a United States penny for size comparison. A rare-earth mineral contains one or more rare-earth elements as major metal constituents. Rare-earth minerals are usually found in association with alkaline to peralkaline igneous complexes in pegmatites. This would be associated with alkaline magmas or with carbonatite ...
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 ...
Rare earths are a group of 17 metals used to make magnets that turn power into motion for electric vehicles, cell phones, missile systems and other electronics. There are no known substitutes.
Critical minerals are among these items, as China dominates global mining and processing of rare earth materials. It already this year imposed export limits on antimony, a strategic metal used in ...
Praseodymium always occurs naturally together with the other rare-earth metals. It is the sixth-most abundant rare-earth element and fourth-most abundant lanthanide, making up 9.1 parts per million of the Earth's crust, an abundance similar to that of boron. In 1841, Swedish chemist Carl Gustav Mosander extracted a rare-earth oxide residue he ...
Most rare earth elements are located in China, with the world’s second-largest economy estimated to account for 70% of global rare earth ore extraction and 90% of rare earth ore processing.
Rare-earth element; J. Journal of Alloys and Compounds; U. United States critical materials list This page was last edited on 2 January 2014, at 18:24 (UTC). ...
These rare-earth oxides are used as tracers to determine which parts of a watershed are eroding. Clockwise from top center: praseodymium, cerium, lanthanum, neodymium, samarium, and gadolinium. Earths were defined by the Ancient Greeks as "materials that could not be changed further by the sources of heat then available". [1]