Spedding, Frank H. Formerly, Ames Laboratory, Energy Research and Development Administration, Iowa State University, Ames, Iowa.
Last reviewed:January 2020
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A metallic rare-earth element, Dy, atomic number 66 and atomic weight 162.50. The naturally occurring element is composed of seven stable isotopes. Dysprosium forms a white oxide, Dy2O3, which dissolves in acid to give a yellowish-green solution. See also: Periodic table; Rare-earth elements
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