rare earths

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rare earths, in chemistry, oxides of the rare-earth metals rare-earth metals, in chemistry, group of metals including those of the lanthanide series and actinide series, usually yttrium, sometimes scandium and thorium, and rarely zirconium.
..... Click the link for more information. . They were once thought to be elements themselves. They are widely distributed in the earth's crust and are fairly abundant, although they were once thought to be very scarce. Generally, the name of an earth is formed from the name of its element by replacing -um with -a; e.g., the earth of cerium is ceria. Mixed rare earths are used in glassmaking, ceramic glazes, glass-polishing abrasives, carbon arc-light electrode cores, and catalysts for petroleum refining. Individual purified rare earths have many uses, e.g., in lasers and as color-television picture tube phosphors. Important rare-earth minerals include bastnasite, cerite, euxenite, gadolinite, monazite, and samarskite.

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No references found			China supplies at least 95 per cent of the world's rare earths - 17 chemical elements with hard-to-pronounce names such as praseo-dymium and yttrium - essential for a wide range of high-tech devices and green technologies. Monopoly in the making by 7 Days (Dubai, United Arab Emirates) China supplies at least 95 percent of the world's rare earths -- 17 chemical elements with hard-to-pronounce names such as praseodymium and yttrium -- essential for a wide range of high-tech devices and green technologies. China corners rare earths market by AFP / AFP Asian Edition China supplies at least 95 percent of the world's rare earths -- 17 chemical elements with hard-to-pronounce names such as praseodymium and yttrium -- essential for a wide range of high-tech devices and green technologies. China corners rare earths market by AFP / AFP Global Edition			Rapisardi, Mario Rapistrum RAPKh Rapla Rapoport, Judith Livant Rapoport, Solomon Seinwil RAPP Rapp, George Rappahannock Rappahannock County Rappahannock River Valley National Wildlife Refuge Rapperswil RAPPORT RAPT Raptanov, Timofei Raptanov, Timofei Alekseevich Rapti raptor raptorial rapture of the deep Rapunzel Rara rare rare earth rare earth metal rare earths rare gas Rare Metal rare mode rare set rare-earth alloy rare-earth chelate laser Rare-Earth Element rare-earth garnet rare-earth magnet rare-earth metals rare-earth mineral rare-earth salts rare-earth-doped fiber amplifier Rare-Metals Industry, Institute of the rarefaction rarefaction wave rarefied rarefied gas Rarefied gas flow rarefraction RAREP Rarita-Schwinger equation Raritan Rarotonga RARP			Rare diseases Rare Diseases Clinical Research rare earth rare earth rare earth rare earth Rare Earth / Transition Metal Rare earth element Rare earth element Rare earth element Rare earth element Rare earth elements Rare earth elements Rare earth elements Rare Earth Information Center Rare earth magnet rare earth magnets Rare earth metal Rare earth metal Rare earth metal Rare earth metals Rare earth metals Rare earth metals Rare earth mineral Rare Earth Oxide Rare Earth Oxysulfide Rare earth permanent magnet Rare earth permanent magnet rare earth screen Rare Earth Society of Japan rare earths Rare Event Probability Estimation Rare Event Risk Assessment Process Rare Fruit Council International Rare Fruit Council of Australia Rare gas Rare gas Rare gas Rare Gas Plant rare gases rare gases rare gases Rare Genetic Steroid Disorders Consortium Rare Giant cell carcinoma Rare Giant cell carcinoma Rare Giant cell carcinoma Rare Groove Orchestra rare hemoglobinopathy Rare Isotope Accelerator Rare Isotope Science Assessment Committee Rare Medium Corp. Rare metal Rare metal Rare metals Rare metals Rare Metals Corporation Rare mode rare occurrence Rare Or Threatened Australian Plants Rare Oriental Cuisine and Concept Rare Plants

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