Ytterbium

Metal

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

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Electronic 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

Thermal data

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

Steric data

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

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay 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	--	--

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.

Ytterbium

Physical data

Electronic data

Thermal data

Steric data

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