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单词 thulium
释义

thulium

/ˈθ(j)uːlɪəm /
noun [mass noun]
The chemical element of atomic number 69, a soft silvery-white metal of the lanthanide series. (Symbol: Tm) Each segment contains small amounts of ions of relatively rare metals, such as dysprosium, thulium, and cerium, which fluoresce in different colors....
  • The pure metal can be produced by treating thulium fluoride with calcium metal.
  • The main rare-earth ions used are thulium (for devices operating at 1450 to 1510 nm) and erbium.

Origin

Late 19th century: modern Latin, from Latin Thule (see Thule (sense 1)), from Greek Thoulē, of unknown origin.

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更新时间:2025/3/23 6:38:59