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thulium    
n. 稀土金屬元素,符號Tm,銩原子序69

稀土金屬元素,符號Tm,銩原子序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 - 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 | Rare Earth Element | Britannica
    thulium (Tm), chemical element, a rare-earth metal of the lanthanide series of the periodic table
  • 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
  • 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
  • Thulium (Tm) - Periodic Table
    Thulium is a chemical element of the periodic table with chemical symbol Tm and atomic number 69 with an atomic weight of 168 934 u and is classed as a lanthanide
  • Thulium - Learnool
    Thulium (Tm) is a chemical element of the periodic table, located in the period 6, and has the atomic number 69 It is the thirteenth element in the lanthanide series It is a bright, silvery-gray metal, whose name comes from “Thule”, the ancient name for Scandinavia
  • Thulium | Tm (Element) - PubChem
    Chemical element, Thulium, information from authoritative sources Look up properties, history, uses, and more
  • Where Is Thulium Found and How Is It Extracted?
    Thulium, symbolized as Tm, is a metallic element with atomic number 69, placing it within the lanthanide series of the periodic table Thulium is notably one of the least abundant naturally occurring lanthanides in the Earth’s crust, second only to the radioactively unstable element promethium





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