High Quality Content by WIKIPEDIA articles Dysprosium ( /dɪsˈproʊziəm/ dis-proh-zee-əm) is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in various minerals, such as xenotime. Naturally occurring dysprosium is composed of 7 isotopes, the most abundant of which is 164Dy.
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