thulium


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thu·li·um

 (tho͞o′lē-əm)
n. Symbol Tm
A bright, soft, silvery, metallic element of the lanthanide series obtained commercially from the mineral monazite, having an x-ray emitting isotope that is used in portable medical x-ray units. Atomic number 69; atomic weight 168.934; melting point 1,545°C; boiling point 1,950°C; specific gravity 9.321 (at 25°C); valence 2, 3. See Periodic Table.

[After Thule1.]

thulium

(ˈθjuːlɪəm)
n
(Elements & Compounds) a malleable ductile silvery-grey element occurring principally in monazite. The radioisotope thulium-170 is used as an electron source in portable X-ray units. Symbol: Tm; atomic no: 69; atomic wt: 168.93421; valency: 3; relative density: 9.321; melting pt: 1545°C; boiling pt: 1950°C
[C19: New Latin, from Thule + -ium]

thu•li•um

(ˈθu li əm)

n.
a rare-earth metallic element found in gadolinite and other uncommon minerals. Symbol: Tm; at. wt.: 168.934; at. no.: 69; sp. gr.: 9.32.
[< French (1879), after Thule, taken as a name for ancient Scandinavia; see -ium2]

thu·li·um

(tho͞o′lē-əm)
Symbol Tm A soft, easily shaped, silver-gray metallic element of the lanthanide series. An artificial radioactive isotope of thulium is used as a radiation source in small, portable x-ray machines. Atomic number 69. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.thulium - a soft silvery metallic element of the rare earth groupthulium - 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
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
apatite - a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus
monazite - a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium
xenotime - a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form
Translations
тулий
thulium
thulium
tulio
tuulium
tulium
thulium
תוליום
tulij
túlium
túlín
ツリウム
thulium
tulis
thulium
thulium
tul
túlio
tuliu
thulium
tulij
tulium
tulyum
tuli

thulium

[ˈθjuːlɪəm] Ntulio m

thulium

n (Chem) → Thulium nt
References in periodicals archive ?
Complications and early postoperative outcome in 1080 patients after thulium vapoenucleation of the prostate: Results at a single institution.
Thulium Tm 69 rarest REE, similar to yttrium, X-ray machines Ytterbium Yb 70 increases electrical resistance, stress gauges, nuclear applications, improving the grain refinement, strength, and other mechanical properties of stainless steel, infrared lasers, chemical reducing agent.
This product is a mix of samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yttrium as oxides.
To date, six types of lasers have been used to treat the prostate: neodymium (Nd):YAG; holmium (Ho):YAG; potassium-titanyl-phosphate (KTP), which is currently being replaced by 120-W lithium borate (LBO); diode; and most recently thulium laser.
The rare earth sector covers companies with operations involving exploration, extraction, transport, processing or any other business involving any of the following 17 rare earth elements: Scandium, Yttrium, Lanthanum, Lutetium, Ytterbium, Thulium, Erbium, Holmium, Dysprosium, Terbium, Gadolinium, Europium, Samarium, Promethium, Neodymium, Praseodymium, and Cerium.
The economic benefits of mining for rare earth minerals are dependent on the concentrations of the various rare earth elements: light rare earth minerals (neodymium, lanthanum, cerium, praesodymium), heavy rare earth minerals (yttrium, dysprosium, terbium, holmium, erbium, thulium, ytterbium, lutetium), and medium rare earth minerals (europium, samarium, and gadolinium), since this has an impact on the cost of refining the rare earth minerals and the degree to which there is demand for these various types of elements.