Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Dysprosium (pronounced dis-PROE-zee- m) 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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