A soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime. Synonyms: atomic number 69, Tm.
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Words linked to "Thulium" : monazite, metallic element, xenotime, Tm, atomic number 69, apatite, metal |
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