Template:Infobox europium

Europium,  ₆₃Eu

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General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery white, with a pale yellow tint; but rarely seen without oxide discoloration
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Europium in the periodic table
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Atomic number (Z)	63
Group	Template:Infobox element/group
Period	period 6
Block	f-block
Element category	Template:Infobox element/category format
Electron configuration	[Xe] 4f7 6s2
Electrons per shell	2, 8, 18, 25, 8, 2
Physical properties
Phase at STP	solid
Melting point	1099 K ​(826 °C, ​1519 °F)
Boiling point	1802 K ​(1529 °C, ​2784 °F)
Density (near r.t.)	5.264 g/cm3
when liquid (at m.p.)	5.13 g/cm3
Heat of fusion	9.21 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]	176 kJ/mol
Molar heat capacity	27.66 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: 1.2
[[Ionization energy|Template:Engvar energies]]	1st: 547.1 kJ/mol 2nd: 1085 kJ/mol 3rd: 2404 kJ/mol
Atomic radius	empirical: 180 pm
Covalent radius	198±6 pm
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Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure
Thermal expansion	poly: 35.0 µm/(m·K) (at r.t.)
Thermal conductivity	est. 13.9 W/(m·K)
Electrical resistivity	poly: 0.900 µΩ·m (at r.t.)
Magnetic ordering	paramagnetic
Magnetic susceptibility	+34,000.0·10−6 cm3/mol
Young's modulus	18.2 GPa
Shear modulus	7.9 GPa
Bulk modulus	8.3 GPa
Poisson ratio	0.152
Vickers hardness	165–200 MPa
CAS Number	7440-53-1
History
Naming	after Europe
Discovery and first isolation	Eugène-Anatole Demarçay (1896, 1901)
Main isotopes of europium
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