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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
  • What Is Thulium? Uses, Properties Applications
    Thulium sits at position 69 in the periodic table, within the lanthanide series In pure form it is a bright, silvery-gray metal that can be cut with a knife — Mohs hardness of 2 to 3 — and is both malleable and ductile
  • 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 (Tm): Uses, Scarcity Supply Risk
    Thulium is one of the least abundant rare earths Thulium uses in portable X-ray sources and surgical lasers, its supply risk, and which countries produce it
  • 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 Element | Uses, Facts, Physical Chemical Characteristics
    Thulium is second least abundant element of the lanthanide series after promethium Its abundance in earth crust is about 0 5 mg kg by weight and 50 parts per million by moles
  • Thulium Tm 69 | Periodic Table of Elements | Los Alamos National Laboratory
    Thulium is a rare earth element that is soft, malleable, and costly to produce due to its low abundance and complex extraction Explore its uses
  • 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 Earths
    Thulium is a silver-grey rare earth metal that is soft at room temperature and can be easily stretched and forged Thulium is the rarest lanthanide after promethium, which only occurs in nature as a by-product of radioactive decay processes





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