Technical data for Dysprosium

Overview
NameDysprosium
SymbolDy
Atomic Number66
Atomic Weight162.5
Density8.551 g/cm3
Melting Point1412 °C
Boiling Point2567 °C

Thermal properties
PhaseSolid
Melting Point1412 °C
Boiling Point2567 °C
Absolute Melting Point1685 K
Absolute Boiling Point2840 K
Heat of Fusion11.1 kJ/mol
Heat of Vaporization280 kJ/mol
Heat of CombustionN/A
Specific Heat167 J/(kg K)[note]
Thermal Conductivity11 W/(m K)
Thermal Expansion9.9×10-6 K-1

Bulk physical properties
Density8.551 g/cm3
Density (Liquid)8.37 g/cm3
Molar Volume0.000019004
Brinell Hardness500 MPa
Vickers Hardness540 MPa
Bulk Modulus41 GPa
Shear Modulus25 GPa
Young Modulus61 GPa
Poisson Ratio0.25
Speed of Sound2710 m/s
Thermal Conductivity11 W/(m K)
Thermal Expansion9.9×10-6 K-1

Reactivity
Valence3
Electronegativity1.22
ElectronAffinity50 kJ/mol
Ionization Energies
573, 1130, 2.2×103, 3990 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockf
GroupN/A
Period6
Electron Configuration[Xe]4f106s2
ColorSilver
Discovery
1886 in France
Gas phaseN/A
CAS NumberCAS7429-91-6

Electrical properties
Electrical TypeConductor
Electrical Conductivity1.1×106 S/m
Resistivity9.1×10-7 m Ω
Superconducting PointN/A

Magnetic properties
Magnetic TypeParamagnetic
Curie Point87 K
Mass Magnetic Susceptibility5.45×10-6
Molar Magnetic Susceptibility8.85625×10-7
Volume Magnetic Susceptibility0.046603

Abundances
% in Universe2×10-7%
% in Sun2×10-7%
% in Meteorites0.000027%
% in Earth's Crust0.00062%
% in Oceans9.1×10-11%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius228 pm
Covalent RadiusN/A
Van der Waals RadiusN/A
Crystal StructureSimple Hexagonal
Lattice Angles
π/2, π/2, 2 π/3
Lattice Constants
359.3, 359.3, 565.37 pm
Space Group NameP63/mmc
Space Group Number194

Nuclear Properties
Half-LifeStable
LifetimeStable
Stable Isotopes
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164Dy
Isotopic Abundances
156Dy0.06%
158Dy0.1%
160Dy2.34%
161Dy18.91%
162Dy25.51%
163Dy24.9%
164Dy28.18%

Notes on the properties of Dysprosium:
Specific Heat: Value given for solid phase.