lanthanum


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Related to lanthanum: Lanthanum oxide, Lanthanum carbonate

lan·tha·num

 (lăn′thə-nəm)
n. Symbol La
A soft, silvery-white, malleable, ductile element of the lanthanide series, obtained chiefly from the minerals monazite and bastnaesite and used in glass manufacture and with other rare-earth elements in carbon lights for movie and television studio lighting. Atomic number 57; atomic weight 138.91; melting point 920°C; boiling point 3,464°C; specific gravity 6.145 (at 25°C); valence 2, 3. See Periodic Table.

[New Latin, from Greek lanthanein, to escape notice (from the finding of the element hidden in oxide of cerium).]

lanthanum

(ˈlænθənəm)
n
(Elements & Compounds) a silvery-white ductile metallic element of the lanthanide series, occurring principally in bastnaesite and monazite: used in pyrophoric alloys, electronic devices, and in glass manufacture. Symbol: La; atomic no: 57; atomic wt: 138.9055; valency: 3; relative density: 6.145; melting pt: 918°C; boiling pt: 3464°C
[C19: New Latin, from Greek lanthanein to lie unseen]

lan•tha•num

(ˈlæn θə nəm)

n.
a rare-earth, trivalent, metallic element, allied to aluminum, found in certain minerals, as monazite. Symbol: La; at. wt.: 138.91; at. no.: 57; sp. gr.: 6.15 at 20°C.
[< New Latin (1841) < Greek lanthán(ein) to escape notice + New Latin -um, for -ium -ium2]

lan·tha·num

(lăn′thə-nəm)
Symbol La A soft, easily shaped, silvery-white metallic element of the lanthanide series. It is used to make glass for lenses and lights for movie and television studios. Atomic number 57. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.lanthanum - a white soft metallic element that tarnishes readilylanthanum - a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
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.
Translations
лантан
lanthan
lanthan
lantano
lantaan
lantaani
לנתן
lantan
lantán
ランタン
lanthanum
lantanas
lantan
lantan
lantânio
lantan
lantan
lantan
lantan
лантан
lantan
References in periodicals archive ?
Merely reducing the amount of neodymium and replacing it with lanthanum and cerium results in a decline in motor performance.
Lanthanum carbonate, the generic equivalent of Shire Development LLC's Fosrenol, is indicated to reduce serum phosphate in patients with endstage renal disease (ESRD).
Sevelamer hydrochloride is a non-absorbable polymer that contains neither aluminum, lanthanum, or calcium.
Lanthanum doped bismuth iron oxide thin films were prepared using sol-gel method.
Lanthanum and cerium will be removed from the rare earth chloride solution using solvent extraction to produce four different rare earth products: lanthanum oxide, 99% grade; cerium hydroxide, 99% grade; mixed lanthanum and cerium oxide, 99% grade; and mixed praseodymium and lutetium oxide.
Lanthanum oxide nanoparticles have been used in the production of the hybrid materials due to their high dielectric constant while anthracene was used due to its very cheap price and good availability.
Portable, handheld radioisotope identification instrument (RIID) technology typically uses one of two types of detector material--sodium iodide (NaI) or lanthanum bromide (LaBr)--in combination with a multi-channel analyzer to segregate pulses from specific gamma energies, that provides a gamma-energy spectrum used to identify a specific radioisotope.
The rest of the volume is devoted to paragraph-long abstracts of articles on properties of lanthanum hexaboride.
This fourth product follows the high purity mid + heavy rare earth oxide, the neodymium - praseodymium oxide and the lanthanum oxide previously announced.
Moreover, we report that lanthanum cyanurate has a long-term thermal stability and can enhance the thermal stability when used with other thermal stabilizer together.
BASF Coatings GmbH has been granted a patent for an aqueous coating composition comprised of a metal oxide selected from the group consisting of bismuth oxide, vanadium oxide, manganese oxide, cobalt oxide, zinc oxide, strontium oxide, yttrium oxide, molybdenum oxide, zirconium oxide, lanthanum oxide, oxides of the lanthanide series of elements