Technical data for Yttrium

Overview
NameYttrium
SymbolY
Atomic Number39
Atomic Weight88.90585
Density4.472 g/cm3
Melting Point1526 °C
Boiling Point3345 °C

Thermal properties
PhaseSolid
Melting Point1526 °C
Boiling Point3345 °C
Absolute Melting Point1799 K
Absolute Boiling Point3618 K
Heat of Fusion11.4 kJ/mol
Heat of Vaporization380 kJ/mol
Heat of CombustionN/A
Specific Heat298 J/(kg K)[note]
Thermal Conductivity17 W/(m K)
Thermal Expansion0.0000106 K-1

Bulk physical properties
Density4.472 g/cm3
Density (Liquid)4.24 g/cm3
Molar Volume0.000019881
Brinell Hardness589 MPa
Bulk Modulus41 GPa
Shear Modulus26 GPa
Young Modulus64 GPa
Poisson Ratio0.24
Speed of Sound3.3×103 m/s
Thermal Conductivity17 W/(m K)
Thermal Expansion0.0000106 K-1

Reactivity
Valence3
Electronegativity1.22
ElectronAffinity29.6 kJ/mol
Ionization Energies
600, 1180, 1980, 5847, 7430, 8970, 11190, 12450, 14110, 1.84×104 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockd
Group3
Period5
Electron Configuration[Kr]4d15s2
ColorSilver
Discovery
1794 in Finland
Gas phaseN/A
CAS NumberCAS7440-65-5

Electrical properties
Electrical TypeConductor
Electrical Conductivity1.8×106 S/m
Resistivity5.6×10-7 m Ω
Superconducting Point1.3

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic Susceptibility6.66×10-8
Molar Magnetic Susceptibility5.921×10-9
Volume Magnetic Susceptibility0.0002978

Abundances
% in Universe7×10-7%
% in Sun1×10-6%
% in Meteorites0.00019%
% in Earth's Crust0.0029%
% in Oceans1.3×10-9%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius212 pm
Covalent Radius162 pm
Van der Waals RadiusN/A
Crystal StructureSimple Hexagonal
Lattice Angles
π/2, π/2, 2 π/3
Lattice Constants
364.74, 364.74, 573.06 pm
Space Group NameP63/mmc
Space Group Number194

Nuclear Properties
Half-LifeStable
LifetimeStable
Stable Isotopes
89Y
Isotopic Abundances
89Y100%

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