gadolinium(redirected from Gadolinum)
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n. Symbol Gd
A silvery-white, malleable, ductile, metallic element of the lanthanide series, with unusual magnetic properties including a Curie point at room temperature, obtained from monazite and bastnaesite and used in improving high-temperature characteristics of iron, chromium, and related alloys, and as a contrast medium for magnetic resonance imaging. Atomic number 64; atomic weight 157.25; melting point 1,313°C; boiling point approximately 3,273°C; specific gravity from 7.901; valence 3. See Periodic Table.
[After Johan Gadolin (1760-1852), Finnish chemist.]
(Elements & Compounds) a ductile malleable silvery-white ferromagnetic element of the lanthanide series of metals: occurs principally in monazite and bastnaesite. Symbol: Gd; atomic no: 64; atomic wt: 157.25; valency: 3; relative density: 7.901; melting pt: 1313±°C; boiling pt: 3273°C (approx.)
[C19: New Latin, from gadolinite]
gad•o•lin•i•um(ˌgæd lˈɪn i əm)
a rare-earth metallic element. Symbol: Gd; at. wt.: 157.25; at. no.: 64.
Symbol Gd A silvery-white, easily shaped metallic element of the lanthanide series that occurs in nature as a mix of seven isotopes. It is used to improve the heat and corrosion resistance of iron, chromium, and various alloys. Atomic number 64. See Periodic Table.
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|Noun||1.||gadolinium - a ductile silvery-white ductile ferromagnetic trivalent metallic element 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.
gadolinite, ytterbite - a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium
samarskite - a complex black mineral occurring in pegmatites