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Technical data for Rhodium

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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
Critical PressureN/A
Critical TemperatureN/A
Heat of Fusion21.7 kJ/mol
Heat of Vaporization495 kJ/mol
Heat of CombustionN/A
Specific Heat240 J/(kg K)[note]
Adiabatic IndexN/A
Neel PointN/A
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
Refractive IndexN/A
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
Heat of CombustionN/A
DOT Hazard Class4.1
DOT Numbers3089
EU NumberN/A
NFPA Fire RatingN/A
NFPA HazardsN/A
NFPA Health RatingN/A
NFPA Reactivity RatingN/A
RTECS NumberRTECSVI9069000
NFPA LabelN/A

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockd
Group9
Period5
Electron Configuration[Kr]4d85s1
ColorSilver
Discovery
1803 in United Kingdom
Gas phaseN/A
CAS NumberCAS7440-16-6
CID NumberCID23948
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberRTECSVI9069000

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 Susceptibility1.36×10-8
Molar Magnetic Susceptibility1.4×10-9
Volume Magnetic Susceptibility0.0001693

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
Decay ModeN/A
Quantum Numbers4F9/2
Neutron Cross Section145
Neutron Mass Absorption0.063
Known Isotopes
89Rh, 90Rh, 91Rh, 92Rh, 93Rh, 94Rh, 95Rh, 96Rh, 97Rh, 98Rh, 99Rh, 100Rh, 101Rh, 102Rh, 103Rh, 104Rh, 105Rh, 106Rh, 107Rh, 108Rh, 109Rh, 110Rh, 111Rh, 112Rh, 113Rh, 114Rh, 115Rh, 116Rh, 117Rh, 118Rh, 119Rh, 120Rh, 121Rh, 122Rh
Stable Isotopes
103Rh
Isotopic Abundances
103Rh100%


Notes on the properties of Rhodium:

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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