- rare earth mineral
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A mineral which contains one or more rare earth elements as major metal constituents.
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rare earth mineral
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Rare-earth mineral — A rare earth mineral is a mineral whose principal element is a rare earth element. Yttrium is found in almost all rare earth minerals. Rare earth minerals are usually found in association with alkaline to per alkaline igneous complexes, in… … Wikipedia
Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare … Wikipedia
rare earth — UK US noun [C or U] (also rare earth element, rare earth metal) NATURAL RESOURCES ► one of a group of metal chemical elements that are difficult to find in large quantities, and are important for technology and manufacturing: »Rare earths are key … Financial and business terms
rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 … Universalium
Mountain Pass rare earth mine — The Mountain Pass mine surface facilities. The upper part of the open pit is seen in the background. Location … Wikipedia
rare — [ rar ] adj. • 1377; rere adj. fém. v. 1236; lat. rarus 1 ♦ (Généralt après le nom) Qui se rencontre peu souvent, dont il existe peu d exemplaires. Objet rare. Chercher une chose rare (cf. Mouton à cinq pattes, merle blanc). Pierres rares. ⇒… … Encyclopédie Universelle
mineral deposit — Introduction aggregate of a mineral in an unusually high concentration. About half of the known chemical elements (chemical element) possess some metallic (metal) properties. The term metal, however, is reserved for those chemical… … Universalium
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
earth — /errth/, n. 1. (often cap.) the planet third in order from the sun, having an equatorial diameter of 7926 mi. (12,755 km) and a polar diameter of 7900 mi. (12,714 km), a mean distance from the sun of 92.9 million mi. (149.6 million km), and a… … Universalium
Mineral — For other uses, see Mineral (disambiguation). An assortment of minerals. A mineral is a naturally occurring … Wikipedia
