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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 ...
Round Top is known for containing rare-earth elements, including the largest deposit of heavy rare-earth elements in the United States, estimated at over 1 billion tons. [5] The rare-earth elements contained in the mountain can be used to build energy and defense applications as well as electronic devices, lasers, in oil and gas drilling, water ...
An overview of one of the regolith-hosted rare earth element deposits (a type of Rare Earth Element mine) in South China [1]. Regolith-hosted rare earth element deposits (also known as ion-adsorption deposits) are rare-earth element (REE) ores in decomposed rocks that are formed by intense weathering of REE-rich parental rocks (e.g. granite, tuff etc.) in subtropical areas. [2]
The Mountain Pass Rare Earth Mine and Processing Facility, owned by MP Materials, is an open-pit mine of rare-earth elements on the south flank of the Clark Mountain Range in California, 53 miles (85 km) southwest of Las Vegas, Nevada. In 2020 the mine supplied 15.8% of the world's rare-earth production.
The term rare-earth element or rare-earth metal is often used to include the stable group 3 elements Sc, Y, and Lu in addition to the 4f elements. [8] All lanthanide elements form trivalent cations, Ln 3+, whose chemistry is largely determined by the ionic radius, which decreases steadily from lanthanum (La) to lutetium (Lu).
U.S. rare earth minerals miner Molycorp Inc. (NYSE: MCP) announced after markets closed today that it had begun production at its Project Phoenix concentrate facilities in Mountain Pass ...
A slight distinction is recognized between the light (LREE) and the heavy rare-earth elements (HREE), but the distinction is not perfect. Yttrium is concentrated in the HREE group due to its ion size, though it has a lower atomic mass. [56] [57] A piece of yttrium. Yttrium is difficult to separate from other rare-earth elements.
Analysts expect worldwide demand for rare earth permanent magnets to double within a decade.