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Technical data for Yttrium

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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
Critical PressureN/A
Critical TemperatureN/A
Heat of Fusion11.4 kJ/mol
Heat of Vaporization380 kJ/mol
Heat of CombustionN/A
Specific Heat298 J/(kg K)[note]
Adiabatic IndexN/A
Neel PointN/A
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
Mohs HardnessN/A
Vickers HardnessN/A
Bulk Modulus41 GPa
Shear Modulus26 GPa
Young Modulus64 GPa
Poisson Ratio0.24
Refractive IndexN/A
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
Heat of CombustionN/A
DOT Hazard Class4.1
DOT Numbers3089
EU NumberN/A
NFPA Fire Rating2
NFPA HazardsN/A
NFPA Health RatingN/A
NFPA Reactivity RatingN/A
RTECS NumberRTECSZG2980000
NFPA LabelNFPA Label

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockd
Group3
Period5
Electron Configuration[Kr]4d15s2
ColorSilver
Discovery
1794 in Finland
Gas phaseN/A
CAS NumberCAS7440-65-5
CID NumberCID23993
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberRTECSZG2980000

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

Magnetic properties
Magnetic TypeParamagnetic
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
Decay ModeN/A
Quantum Numbers2D3/2
Neutron Cross Section1.28
Neutron Mass Absorption0.0006
Known Isotopes
76Y, 77Y, 78Y, 79Y, 80Y, 81Y, 82Y, 83Y, 84Y, 85Y, 86Y, 87Y, 88Y, 89Y, 90Y, 91Y, 92Y, 93Y, 94Y, 95Y, 96Y, 97Y, 98Y, 99Y, 100Y, 101Y, 102Y, 103Y, 104Y, 105Y, 106Y, 107Y, 108Y
Stable Isotopes
89Y
Isotopic Abundances
89Y100%


Notes on the properties of Yttrium:

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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