terbium

ter·bi·um

T0113100 (tûr′bē-əm)n. Symbol Tb A soft, silvery-gray metallic element of the lanthanide series, extracted chiefly from monazite, used in high-temperature fuel cells as a stabilizer, in alloys responsive to a magnetic field, and in x-ray machines and lasers. Atomic number 65; atomic weight 158.925; melting point 1,356°C; boiling point 3,230°C; specific gravity 8.230; valence 3, 4. See Periodic Table.

[After Ytterby, a town in Sweden.]

terbium

(ˈtɜːbɪəm) n (Elements & Compounds) a soft malleable silvery-grey element of the lanthanide series of metals, occurring in gadolinite and monazite and used in lasers and for doping solid-state devices. Symbol: Tb; atomic no: 65; atomic wt: 158.92534; valency: 3 or 4; relative density: 8.230; melting pt: 1356°C; boiling pt: 3230°C[C19: from New Latin, named after Ytterby, Sweden, village where it was discovered] ˈterbic adj

ter•bi•um

(ˈtɜr bi əm)

n. a rare-earth, metallic element present in certain minerals and yielding colorless salts. Symbol: Tb; at. no.: 65; at. wt.: 158.924; sp. gr.: 8.25. [1843; (Yt)terb(y), a town in Sweden, source of rare earth–containing minerals + -ium²; compare ytterbium] ter′bic, adj.

ter·bi·um

(tûr′bē-əm) Symbol Tb A soft, easily shaped, silvery-gray metallic element of the lanthanide series. It is used in color television tubes, x-ray machines, and lasers. Atomic number 65. See Periodic Table.

Thesaurus

Noun

terbium - a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbiteatomic number 65, Tbmetal, 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 phosphorusgadolinite, ytterbite - a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbiummonazite - a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium

Translations

terbium

(tûr`bēəm) [from Ytterby, a village in Sweden], metallic chemical element; symbol Tb; at. no. 65; at. wt. 158.92535; m.p. 1,356&degC;; b.p. 3,123&degC;; sp. gr. about 8.25; valence +3 or +4. Terbium is a soft, malleable, ductile, silver-gray metal. It is one of the rare-earth metalsrare-earth metals,
in chemistry, group of metals including those of the lanthanide series and actinide series and usually yttrium, sometimes scandium and thorium, and rarely zirconium. Promethium, which is not found in nature, is not usually considered a rare-earth metal.
..... Click the link for more information. of the lanthanide serieslanthanide series,
a series of metallic elements, included in the rare-earth metals, in Group 3 of the periodic table. Members of the series are often called lanthanides, although lanthanum (atomic number 57) is not always considered a member of the series.
..... Click the link for more information. in Group 3 of the periodic tableperiodic table,
chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled
..... Click the link for more information. . It does not tarnish rapidly in air. Its oxide, terbia, Tb₂O₃, is white; its peroxide, Tb₄O₇, is dark brown to black. Most of the salts are colorless or white and all contain trivalent terbium. The element and its compounds have limited commercial importance; some minor uses are in lasers, semiconductor devices, and phosphors for color television picture tubes. Terbium is found in gadolinite, cerite, and other rare-earth minerals and is recovered from euxenite, monazite, and zenotime. It is difficult to separate it from the other rare-earth metals; several methods are used. The pure metal may be produced by chemical reduction of the halide with calcium. The element was discovered in 1843 by C. G. Mosander as its oxide, which he called erbia. The element has been known as terbium since 1877.

Terbium

Tb, the chemical element with atomic number 65 and atomic weight 158.9254; a rare-earth metal and a lanthanide.

terbium

[′tər·bē·əm] (chemistry) A rare-earth element, symbol Tb, in the yttrium subgroup of the transition elements, atomic number 65, atomic weight 158.9254.

terbium

a soft malleable silvery-grey element of the lanthanide series of metals, occurring in gadolinite and monazite and used in lasers and for doping solid-state devices. Symbol: Tb; atomic no.: 65; atomic wt.: 158.92534; valency: 3 or 4; relative density: 8.230; melting pt.: 1356°C; boiling pt.: 3230°C

terbium

[ter´be-um] a chemical element, atomic number 65, atomic weight 158.924, symbol Tb. (See Appendix 6.)

ter·bi·um (Tb),

(ter'bē-ŭm), A metallic element of the lanthanide or rare earth series, atomic no. 65, atomic wt. 158.92534. [fr. Ytterby, a village in Sweden]

ter·bi·um

(tĕr'bē-ŭm) A metallic element of the lanthanide or rare earth series, atomic no. 65, atomic wt. 158.92534. [fr. Ytterby, a village in Sweden]

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Synonyms for terbium

noun a metallic element of the rare earth group

Synonyms

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