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Ytterbium

Metalsolid
Symbol: Yb
Atomic number: 70
Atomic mass: 173.04
Group: Lanthanide
CAS-number: 7440-64-4

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Physical data
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Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 18, 32, 8, 2
Orbitals: [Xe] 4f14 6s2
Electronegativity: --, 1.1
1. Ionization potential: 6.2542 eV
2. Ionization potential: 12.188 eV
3. Ionization potential: 25.03 eV
Oxidation states: 3, 2
Electrical conductivity: 0.0351 10^6
Melting point: 819 °C
Boiling point: 1196 °C
Specific heat: 0.15 J/gK
Heat of fusion: 7.660 kJ/mol
Heat of vaporization: 128.90 kJ/mol
Thermal conductivity: 0.349 W/cmK
Atomic radius: 2.40 Å
Ionic radius: 0.99 Å (+3)
Covalent radius: 1.74 Å
Atomic volume: 24.79 cm³/mol
Density (293 K): 6.98 g/cm³
Crystal structure: cubic face centered
cubic face centered

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
168Yb 0.135 167.934 0 -- --
169Yb 0 169 7/2 32.03d EC View
170Yb 3.03 169.935 0 -- --
171Yb 14.31 170.937 1/2 -- --
172Yb 21.82 171.937 0 -- --
173Yb 16.13 172.938 5/2 -- --
174Yb 31.84 173.939 0 -- --
175Yb 0 175 7/2 4.19d β- View
176Yb 12.73 175.943 0 -- --

Other info

Name origin:Named for the Swedish village of Ytterby.
Description:Silvery, lustrous, malleable, and ductile metal.
Discovered by:Jean de Marignac
Year:1878
Place:Switzerland
Sources:Found in minerals such as yttria, monazite, gadolinite, and xenotime. Monazite is often 50% rare earth by weight and typically 0.03% ytterbium.
Use(s):Used in metallurgical and chemical experiments.