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lutetium-175
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lutetium-175

chemical isotope
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Lutetium-175 is a stable isotope of lutetium (Lu), a chemical element and a rare-earth metal. Lutetium is the densest and highest-melting rare-earth element, and the last in the lanthanide series of the periodic table. In its pure form, lutetium metal is silvery white and stable in air. It is easily dissolved by acids, except for hydrofluoric acid.

Natural lutetium consists of two isotopes: the stable lutetium-175, which makes up 97.4 percent, and the radioactive lutetium-176. Lutetium-175 itself has few practical applications but is sometimes used as a catalyst in cracking processes and as a radiation source for cancer treatment.12

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