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Author: langbot
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English[en]
Dysprosium is the chemical element with the symbol Dy and atomic number 66. It is a rare-earth element in the lanthanide series with a metallic silver luster. Dysprosium is never found in nature as a free element, though, like other lanthanides, it is found in various minerals, such as xenotime. Naturally occurring dysprosium is composed of seven isotopes, the most abundant of which is 164Dy. Dysprosium was first identified in 1886 by Paul Émile Lecoq de Boisbaudran, but it was not isolated in pure form until the development of ion-exchange techniques in the 1950s. Dysprosium has relatively few applications where it cannot be replaced by other chemical elements. It is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility (χv ≈ 5.44×10−3) in data-storage applications, and as a component of Terfenol-D (a magnetostrictive material). Soluble dysprosium salts are mildly toxic, while the insoluble salts are considered non-toxic.
Cornish[kw]
Elven gymyk yw dysprosiom, niver 66 y'n Vosen Beriodek. Y furvell yw Dy. An hanow a dheu dhyworth an ger Greka dysprositos, ow styrya kales dhe gavos. Onan a'n elvennow dor-tanow po lanthanid yw. Pur vyghan yw rann dysprosiom y'n korf denel. Diskudhys veu gans Paul-Emile Lecoq de Boisbaudran yn 1886 yn Paris. Askorrys yw a-dro dhe 100 tonnas pub bledhen, avel an alkan ha'y oksid. Pur vedhel yw an alkan, usys dhe wul kesalkenyow tennvenek, warbarth ha neodymiom, horn ha boron. Devnydh aral yw lugern pur lew der usya dysprosiom iodid. Usys yw yn dasoberoryon nuklerek dhe sugna nywtrons. Devnydhyow erel yw yn priweyth ha plasennow optykal.Dysprosiom yw diwweyth moy pols ages sten y'n kerghynnedh. Poos atomek dysprosiom yw 162.5, y boynt teudhi yw 1412°C ha'y boynt bryjyon yw 2560°C. Y dhosedh yw 8.6kg an liter. Alkan golow arghansek yw.