cerium


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ce·ri·um

 (sîr′ē-əm)
n. Symbol Ce
A lustrous, iron-gray, malleable metallic element of the lanthanide series that occurs chiefly in the minerals monazite and bastnaesite, exists in four allotropic states, is a constituent of pyrophoric alloys, and is used in metallurgy and in the manufacture of glass, incandescent mantles, and hydrocarbon combustion catalysts. Atomic number 58; atomic weight 140.12; melting point 799°C; boiling point 3,443°C; specific gravity 6.77; valence 3, 4. See Periodic Table.

cerium

(ˈsɪərɪəm)
n
(Elements & Compounds) a malleable ductile steel-grey element of the lanthanide series of metals, used in lighter flints and as a reducing agent in metallurgy. Symbol: Ce; atomic no: 58; atomic wt: 140.115; valency: 3 or 4; relative density: 6.770; melting pt: 798°C; boiling pt: 3443°C
[C19: New Latin, from Ceres (the asteroid) + -ium]

ce•ri•um

(ˈsɪər i əm)

n.
a steel-gray, ductile metallic element of the rare-earth group found only in combination. Symbol: Ce; at. wt.: 140.12; at. no.: 58.
[1795–1805; Cer (es) + -ium2]

ce·ri·um

(sîr′ē-əm)
Symbol Ce A shiny, gray metallic element of the lanthanide series. It is easily shaped and in pure form will ignite if scratched with a knife. It is used in glass polishing and as a catalyst in self-cleaning ovens. Atomic number 58. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cerium - a ductile grey metallic element of the lanthanide seriescerium - a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group
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.
bastnaesite, bastnasite - a yellow-to-brown mineral that is a source of rare earth elements
gadolinite, ytterbite - a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium
monazite - a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium
Translations
церий
cercér
cerium
cerio
tseerium
cerium
cerij
cérium
serín
セリウム
cerium
ceris
cerium
cer
ceriu
cér
cerij
cerium
seryum
References in periodicals archive ?
The difference in radii and electronegativity of Cerium and Aluminium was diminished by applying pressure.
For the conversion coatings, a protective barrier oxide in the form of a cerium oxide for cerium-based or mixed Cr(III)/Cr(VI) for the chromate adds to the protective oxide system.
Cerium staked his claim for the Arkle Trophy, for which he was left at 20-1 by Coral and at 14-1 by William Hill, with a length and a half success over stablemate Hors La Loi III in the Dick Reynolds Novices' Handicap Chase.
Cerium, sent off the 11-10 favourite, took up the running approaching two fences from home and was always holding his 6-4 market rival.
For the realization of an international physics experiment, CEA plans to carry out in Russia a radioactive source of cerium 144 having an activity of between 3.
In 2010, a solid cast insert with equal parts bismuth and cerium proved successful in controlling the formation of chunky graphite in field trials at a number of metalcasting facilities across Europe.
I know that Howard [Johnson] is also looking at the same option - he has Abbeybraney (no 40) in and wants Royal Rosa, who is listed one below Cerium at 43rd, to run instead.
Cerium is 50-1 with totesport to go four places better in the Grand National in 12 months' time.
The pair were nine lengths clear of third-placed Neltina and bookmakers were impressed with Triumph Hurdle fourth Cerium.
The results obtained led to the conclusion that, among the different pretreatments studied, the best performance was obtained with titanium and cerium compounds.
A portion of the neodymium has been replaced with lanthanum (La) and cerium (Ce), which are low-cost rare earths, reducing the amount of neodymium used in the magnet.
In alloy systems that use cerium in combination with common aluminum alloying elements such as silicon, magnesium and/or copper, the casting characteristics are generally better than the aluminum-copper system.