Medical Definition rare earth noun ˌrer-ˈərth 1 : any of a group of similar oxides of metals or a mixture of such oxides occurring together in widely distributed but relatively scarce minerals 2 : rare earth element Last Updated: 10 May 2025 - Updated example sentences ...
Define Rare earth metals. Rare earth metals synonyms, Rare earth metals pronunciation, Rare earth metals translation, English dictionary definition of Rare earth metals. n. 1. Any of various oxides of the rare-earth elements. 2. A rare-earth element. Ame
rare earth metals (REMsThis chapter discusses the uses, physical and chemical properties, mammalian toxicology, sources of exposure, industrial hygiene and medical management of rare earth metals. Rare earth elements are present in many minerals, principally monazite and bastnasite, gadolinite, eu...
Rare earth metals, a group of 17 elements encompassing 15 lanthanides along with scandium and yttrium, have long been shrouded in mystery and misconceptions. This article aims to unravel the importance of rare earth metals by delving into their definition, debunking the myth of scarcity, and explo...
rare-earth metals, in chemistry, group of metals including those of the lanthanide series and actinide series and usually yttrium, sometimes scandium and thorium, and rarely zirconium. Promethium, which is not found in nature, is not usually considered
Rare earth metals(REMs) are group of 15 elements of thelanthanide seriesincluding Sc and Y, which are mainly classified into two groups based on their ionic radius; lightrare earth elements(LREEs) from La to Sm and heavy rare earth elements (HREEs) from Eu to Lu. These metals possess si...
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It is known that, according to the IUPAC definition, “rare earth metals” (REMs, or “rare earth elements”, REEs) are a family of 17 elements in the periodic table. They start with lanthanum (atomic no. 57) and end with lutetium (atomic no. 71), called all together “lanthanides gr...
There is no firm definition of rare earth metals, but the term generally refers to metals used in small quantities. Rare earth metals include: rare earth elements—17 elements in the periodic table, the 15 lanthanides plus scandium and yttrium; six platinum group elements; and other byproduct ...
Define Rare metals. Rare metals synonyms, Rare metals pronunciation, Rare metals translation, English dictionary definition of Rare metals. n. Any of several metals, including gold and platinum, that have high economic value. American Heritage® Dictio