Technical data for Rhodium

Overview
NameRhodium
SymbolRh
Atomic Number45
Atomic Weight102.9055
Density12.45 g/cm3
Melting Point1964 °C
Boiling Point3695 °C

Thermal properties
PhaseSolid
Melting Point1964 °C
Boiling Point3695 °C
Absolute Melting Point2237 K
Absolute Boiling Point3968 K
Heat of Fusion21.7 kJ/mol
Heat of Vaporization495 kJ/mol
Heat of CombustionN/A
Specific Heat240 J/(kg K)[note]
Thermal Conductivity150 W/(m K)
Thermal Expansion8.2×10-6 K-1

Bulk physical properties
Density12.45 g/cm3
Density (Liquid)10.7 g/cm3
Molar Volume8.2655×10-6
Brinell Hardness1.1×103 MPa
Mohs Hardness6 MPa
Vickers Hardness1246 MPa
Bulk Modulus380 GPa
Shear Modulus150 GPa
Young Modulus275 GPa
Poisson Ratio0.26
Speed of Sound4.7×103 m/s
Thermal Conductivity150 W/(m K)
Thermal Expansion8.2×10-6 K-1

Reactivity
Valence6
Electronegativity2.28
ElectronAffinity109.7 kJ/mol
Ionization Energies
719.7, 1740, 2997 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockd
Group9
Period5
Electron Configuration[Kr]4d85s1
ColorSilver
Discovery
1803 in United Kingdom
Gas phaseN/A
CAS NumberCAS7440-16-6

Electrical properties
Electrical TypeConductor
Electrical Conductivity2.3×107 S/m
Resistivity4.3×10-8 m Ω
Superconducting PointN/A

Magnetic properties
Magnetic TypeParamagnetic
Curie PointN/A
Mass Magnetic Susceptibility1.32×10-8
Molar Magnetic Susceptibility1.358×10-9
Volume Magnetic Susceptibility0.0001643

Abundances
% in Universe6×10-8%
% in Sun2×10-7%
% in Meteorites0.000018%
% in Earth's Crust7×10-8%
% in OceansN/A
% in HumansN/A

Atomic dimensions and structure
Atomic Radius173 pm
Covalent Radius135 pm
Van der Waals RadiusN/A
Crystal StructureFace Centered Cubic
Lattice Angles
π/2, π/2, π/2
Lattice Constants
380.34, 380.34, 380.34 pm
Space Group NameFm_ 3m
Space Group Number225

Nuclear Properties
Half-LifeStable
LifetimeStable
Stable Isotopes
103Rh
Isotopic Abundances
103Rh100%

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