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n. Symbol Yb
A soft, bright, silvery element of the lanthanide series occurring in three allotropic forms and used as an x-ray source for portable irradiation devices, as a dopant for laser materials, and in solar cells and some special alloys. Atomic number 70; atomic weight 173.05; melting point 824°C; boiling point 1,196°C; specific gravity 6.903 (alpha form), 6.966 (beta form); valence 2, 3. See Periodic Table.
[After Ytterby, a town in Sweden.]
yt·ter′bic (-bĭk) adj.
(Elements & Compounds) a soft malleable silvery element of the lanthanide series of metals that occurs in monazite and is used to improve the mechanical properties of steel. Symbol: Yb; atomic no: 70; atomic wt: 173.04; valency: 2 or 3; relative density: 6.903 (alpha), 6.966 (beta); melting pt: 819°C; boiling pt: 1196°C
[C19: New Latin; see ytterbia]
yt•ter•bi•um(ɪˈtɜr bi əm)
a rare metallic element forming compounds resembling those of yttrium. Symbol: Yb; at. wt.: 173.04; at. no.: 70; sp. gr.: 6.96.
[1875–80; < New Latin, =Ytterb(y) a quarry near Stockholm, Sweden + -ium -ium2]
yt•ter′bic, yt•ter′bous, adj.
Symbol Yb A soft, silvery-white, easily shaped metallic element of the lanthanide series that occurs as seven stable isotopes. It is used as a radiation source for portable x-ray machines. Atomic number 70. See Periodic Table.
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|Noun||1.||ytterbium - a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite 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.
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
xenotime - a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form