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Atomic: M.A.C. | Reference
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Dysprosium
Electrons per shell 2,8,18,28,8,2
Electron Configuration [Xe] 4f10 6s2 open electron config
Ground state 5I8
Atomic Volume 19 cm3 mol-1
Electronegativity 1.22
Magnetic ordering Nonmagnetic at r.t., ferromagnetic under liquid nitrogen
Mass magnetic susceptibility 5.45 x 10-6
Molar magnetic susceptibility 8.85625 x 10-7
Speed of sound 2710 m s-1
Thermal Properties
Enthalpy of Atomization 301 kJ mol-1 @25°C
Enthalpy of Fusion 17.2 kJ mol-1
Enthalpy of Vaporisation 293 kJ mol-1
Heat Capacity 27.7 J mol-1 K-1
Thermal Conductivity 10.7 W m-1 K-1
Thermal Expansion 9.9 μm m-1 K-1
Hardness
Brinell hardness 500 MPa
Vickers hardness 540 MPa
Elastic Properties
Bulk modulus 40.5 GPa
Poisson ratio 0.247
Shear modulus 24.7 GPa
Young's modulus 61.4 GPa
Electrical Properties
Electrical resistivity 9.1 x 10-7 Ω m
Electrical conductivity 0.0108 106/cm Ω
Chemical Properties
Electrochemical Equivalent 2.021 g Ah-1
Valence Electron Potential (-eV) 47.4
Ionization Potential  
First 5.94
Second 11.67
Third 22.802
Energy Levels
Kα1 (intensity 100) 45.9984 KeV
Kα2 (intensity 50) 45.2078 KeV
Kβ1 (intensity 23.5) 52.119 KeV
Kβ2 (intensity 8.5) 53.3536 KeV
Kβ3 (intensity 9.5) 51.9565 KeV
Lα1 (intensity 100) 6.4952 KeV
Lα2 (intensity 10) 6.4577 KeV
Lβ1 (intensity 42) 7.2477 KeV
Lβ2 (intensity 17) 7.6357 KeV
Lβ3 (intensity 10) 7.3699 KeV
Lβ4 (intensity 7) 7.2023 KeV
Lγ1 (intensity 5.8) 8.4188 KeV
Lγ2 (intensity 2) 8.7153 KeV
Lγ3 (intensity 2) 6.532 KeV
Ll (intensity 4.5) 5.7445 KeV
Atomic Radii
Empirical 175 pm
Bohr Radius 228 pm
Covalent Radius No data.
Van der Waals No data.
Triple covalent No data.
Metallic 178.1 pm
Oxidation States
Main Dy+3
Other Dy+2, Dy+4
Ionisation Energies (kJ mol-1) show graph
M - M+ 571.9
M+ - M2+ 1126
M2+ - M3+ 2200
M3+ - M4+ 4001
Vapour Pressure
P (Pa) 1 10 100 1K 10K 100K
T (K) 1378 1523 (1704) (1954) (2304) (2831)
Crystal Structure
Structure Hexagonal close packed
a = 359.3 pm
b = 359.3 pm
c = 565.37 pm
α = 90°
β = 90°
γ = 120°