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thulium    
n. 稀土金属元素,符号Tm,铥原子序69

稀土金属元素,符号Tm,铥原子序69

thulium
n 1: 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 [synonym: {thulium}, {Tm}, {atomic number 69}]

Thulium \Thu"li*um\, n. [NL. See {Thule}.] (Chem.)
A rare metallic element of the lanthanide group having atomic
number 69, and atomic weight 168.93. It is found in the
mineral gadolinite and other minerals, together with other
rare earths. For more information see the data from
ChemGlobe.
[1913 Webster PJC]


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  • Thulium - Wikipedia
    Despite its high price and rarity, thulium is used as a dopant in solid-state lasers It has no significant biological role and is not particularly toxic Artificial radioactive isotopes of thulium are used as radiation sources in some portable X-ray devices
  • Thulium | Rare Earth Element | Britannica
    thulium (Tm), chemical element, a rare-earth metal of the lanthanide series of the periodic table
  • Thulium - Element information, properties and uses | Periodic Table
    When irradiated in a nuclear reactor, thulium produces an isotope that emits x-rays A ‘button’ of this isotope is used to make a lightweight, portable x-ray machine for medical use Thulium is used in lasers with surgical applications Thulium has no known biological role It is non-toxic
  • Thulium Facts, Symbol, Discovery, Properties, Uses
    Thulium is found in small quantities in monazite, a mineral that has approximately 20 parts per million (ppm) of the metal in the earth’s crust [1] It is then commercially extracted through ion-exchange and solvent-extraction processes [1]
  • Thulium Facts - Element Tm or Atomic Number 69
    Thulium (Tm) is a rare earth element, part of the lanthanide series and f-block in the periodic table Its atomic number is 69 and its element symbol is Tm Most of the rare earths are not all that uncommon, but thulium truly is rare
  • Thulium Element | Uses, Facts, Physical Chemical Characteristics
    Thulium is used as radiation source in portable X-ray devices Thulium was discovered in 1879 by Per Teodor Cleve He followed the same method of Carl Gustaf Mosander to find the impurities in the oxides of rare earth element
  • Thulium Element Facts Chemistry - chemicool. com
    Thulium is a bright, soft, malleable, silvery-gray metal It is a rare earth metal and is one of the least abundant The metal tarnishes slowly in dry air to form the oxide and reacts with water to form the hydroxide and hydrogen gas Tm 3+ ions emit a strong blue luminescence when excited
  • Thulium: Rare Earth Element with Specialized Applications
    Discover the fascinating world of Thulium, a rare-earth element with the atomic number 69 Learn about its unique physical and chemical properties, its specialized industrial and medical applications, and its significance in modern technology
  • Thulium - Wikiwand
    Thulium is a chemical element; it has symbol Tm and atomic number 69 It is the thirteenth element in the lanthanide series of metals It is the second-least ab
  • Periodic Table of Elements: Los Alamos National Laboratory
    Named after Thule, the earliest name for Scandinavia Discovered in 1879 by Cleve Thulium occurs in small quantities along with other rare earths in a number of minerals It is obtained commercially from monazite, which contains about 0 007% of the element





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