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Europium Properties
Europium


Physical
0
Melting Point
822.00 °C 55
Boiling Point
1,597.00 °C 56
Hardness
0
Mohs Hardness
Not Available 0
Brinell Hardness
Not Available 0
Vickers Hardness
167.00 MPa 34
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Speed of Sound
Not Available 0
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Eu 0
Isotopes
0
Known Isotopes
31 8
Electronegativity
0
Pauling Electronegativity
1.20 39
Sanderson Electronegativity
1.01 22
Allred Rochow Electronegativity
Not Available 0
Mulliken-Jaffe Electronegativity
Not Available 0
Allen Electronegativity
Not Available 0
Electropositivity
0
Pauling Electropositivity
Not Available 0
Ionization Energies
0
1st Energy Level
547.10 kJ/mol 71
2nd Energy Level
1,085.00 kJ/mol 74
3rd Energy Level
2,404.00 kJ/mol 51
Electrochemical Equivalent
1.89 g/amp-hr 33
Electron Work Function
2.50 eV 43
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility 0
Mechanical
0
Density
0
Density At Room Temperature
5.26 g/cm3 69
Density When Liquid (at m.p.)
5.13 g/cm3 47
Vapor Pressure
0
Vapor Pressure at 1000 K
19.40 (Pa) 4
Vapor Pressure at 2000 K
Not Available 0
Tensile Strength
120.00 MPa 15
Viscosity
Not Available 0
Elasticity properties
0
Shear Modulus
7.90 GPa 44
Bulk Modulus
8.30 GPa 46
Young's Modulus
18.20 GPa 47
Poisson Ratio
0.15 34
Other Mechanical Properties
Ductile 0
Periodic Table
0
Symbol
Eu 0
Group Number
Not Available 0
Period Number
6 2
Block
f block 0
Element Family
Lanthanide 0
Atomic
0
Atomic Number
63 53
Atomic Weight
151.96 amu 47
Atomic Volume
28.90 cm3/mol 8
Electron Configuration
[Xe] 4f7 6s2 0
Valence Electron Potential
45.60 (-eV) 35
Atom
0
Number of Protons
63 52
Number of Neutrons
89 38
Number of Electrons
63 52
Crystal Structure
Body Centered Cubic (BCC) 0
Crystal Lattice
BCC-Crystal-Structure-.jpg#100 0
Radius of an Atom
0
Atomic Radius
180.00 pm 14
Covalent Radius
198.00 pm 13
Van der Waals Radius
233.00 pm 18
Lattice Constant
458.10 pm 17
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Adjacent Atomic Numbers
0
Next Element
14 0
Previous Element
50 0
Magnetic
0
Electrical Properties
0
Resistivity
0.90 nΩ·m 62
Electrical Conductivity
0.01 106/cm Ω 55
Electron Affinity
50.00 kJ/mol 21
Electrical Property
Conductor 0
Magnetic Characteristics
0
Specific Gravity
5.24 55
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Thermal
0
Specific Heat
0.18 J/(kg K) 33
Thermal Conductivity
13.90 W/m·K 56
Critical Temperature
Not Available 0
Molar Heat Capacity
27.66 J/mol·K 16
Thermal Expansion
35.00 µm/(m·K) 8
Standard Molar Entropy
77.80 J/mol.K 4
Enthalpy
0
Enthalpy of Vaporization
143.50 kJ/mol 48
Enthalpy of Fusion
9.21 kJ/mol 37
Enthalpy of Atomization
180.00 kJ/mol 47
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