Template:Infobox ytterbium

Ytterbium,  ₇₀Yb

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General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery white; with a pale yellow tint
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Ytterbium in the periodic table
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Atomic number (Z)	70
Group	Template:Infobox element/group
Period	period 6
Block	f-block
Element category	Template:Infobox element/category format
Electron configuration	[Xe] 4f14 6s2
Electrons per shell	2, 8, 18, 32, 8, 2
Physical properties
Phase at STP	solid
Melting point	1097 K ​(824 °C, ​1515 °F)
Boiling point	1469 K ​(1196 °C, ​2185 °F)
Density (near r.t.)	6.90 g/cm3
when liquid (at m.p.)	6.21 g/cm3
Heat of fusion	7.66 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]	129 kJ/mol
Molar heat capacity	26.74 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]] Template:Infobox element/vapor pressure table
Atomic properties
Oxidation states	Template:Infobox element/symbol-to-oxidation-state
Electronegativity	Pauling scale: 1.1 (?)
[[Ionization energy|Template:Engvar energies]]	1st: 603.4 kJ/mol 2nd: 1174.8 kJ/mol 3rd: 2417 kJ/mol
Atomic radius	empirical: 176 pm
Covalent radius	187±8 pm
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Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure
Speed of sound thin rod	1590 m/s (at 20 °C)
Thermal expansion	β, poly: 26.3 µm/(m·K) (r.t.)
Thermal conductivity	38.5 W/(m·K)
Electrical resistivity	β, poly: 0.250 µΩ·m (at r.t.)
Magnetic ordering	paramagnetic
Magnetic susceptibility	+249.0·10−6 cm3/mol (2928 K)
Young's modulus	β form: 23.9 GPa
Shear modulus	β form: 9.9 GPa
Bulk modulus	β form: 30.5 GPa
Poisson ratio	β form: 0.207
Vickers hardness	205–250 MPa
Brinell hardness	340–440 MPa
CAS Number	7440-64-4
History
Naming	after Ytterby (Sweden), where it was mined
Discovery	Jean Charles Galissard de Marignac (1878)
First isolation	Carl Auer von Welsbach (1906)
Main isotopes of ytterbium
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