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Technical data for Dysprosium

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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
Critical PressureN/A
Critical TemperatureN/A
Heat of Fusion11.1 kJ/mol
Heat of Vaporization280 kJ/mol
Heat of CombustionN/A
Specific Heat167 J/(kg K)[note]
Adiabatic IndexN/A
Neel Point178 K
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
Mohs HardnessN/A
Vickers Hardness540 MPa
Bulk Modulus41 GPa
Shear Modulus25 GPa
Young Modulus61 GPa
Poisson Ratio0.25
Refractive IndexN/A
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
Heat of CombustionN/A
DOT Hazard ClassN/A
DOT NumbersN/A
EU NumberN/A
NFPA Fire RatingN/A
NFPA HazardsN/A
NFPA Health RatingN/A
NFPA Reactivity RatingN/A
RTECS NumberN/A
NFPA LabelN/A

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockf
GroupN/A
Period6
Electron Configuration[Xe]4f106s2
ColorSilver
Discovery
1886 in France
Gas phaseN/A
CAS NumberCAS7429-91-6
CID NumberCID23912
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberN/A

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
Decay ModeN/A
Quantum Numbers5I8
Neutron Cross Section1010
Neutron Mass Absorption0.2
Known Isotopes
138Dy, 139Dy, 140Dy, 141Dy, 142Dy, 143Dy, 144Dy, 145Dy, 146Dy, 147Dy, 148Dy, 149Dy, 150Dy, 151Dy, 152Dy, 153Dy, 154Dy, 155Dy, 156Dy, 157Dy, 158Dy, 159Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164Dy, 165Dy, 166Dy, 167Dy, 168Dy, 169Dy, 170Dy, 171Dy, 172Dy, 173Dy
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.

Up to date, curated data provided by
Mathematica's ElementData function from Wolfram Research, Inc.

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