Technical data for Uranium

Overview
NameUranium
SymbolU
Atomic Number92
Atomic Weight238.02891
Density19.05 g/cm3
Melting Point1135 °C
Boiling Point3927 °C

Thermal properties
PhaseSolid
Melting Point1135 °C
Boiling Point3927 °C
Absolute Melting Point1408 K
Absolute Boiling Point4.2×103 K
Heat of Fusion14 kJ/mol
Heat of Vaporization420 kJ/mol
Heat of CombustionN/A
Specific Heat116 J/(kg K)[note]
Thermal Conductivity27 W/(m K)
Thermal Expansion0.0000139 K-1

Bulk physical properties
Density19.05 g/cm3
Density (Liquid)17.3 g/cm3
Molar Volume0.000012495
Brinell Hardness2.4×103 MPa
Mohs Hardness6 MPa
Vickers Hardness1960 MPa
Bulk Modulus100 GPa
Shear Modulus111 GPa
Young Modulus208 GPa
Poisson Ratio0.23
Speed of Sound3155 m/s
Thermal Conductivity27 W/(m K)
Thermal Expansion0.0000139 K-1

Reactivity
Valence6
Electronegativity1.38
ElectronAffinityN/A
Ionization Energies
597.6, 1420 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockf
GroupN/A
Period7
Electron Configuration[Rn]5f36d17s2
ColorSilver
Discovery
1789 in Germany
Gas phaseN/A
CAS NumberCAS7440-61-1

Electrical properties
Electrical TypeConductor
Electrical Conductivity3.6×106 S/m
Resistivity2.8×10-7 m Ω
Superconducting Point0.68

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic Susceptibility2.15×10-8
Molar Magnetic Susceptibility5.118×10-9
Volume Magnetic Susceptibility0.0004096

Abundances
% in Universe2×10-8%
% in Sun1×10-7%
% in Meteorites9.8×10-7%
% in Earth's Crust0.00018%
% in Oceans3.3×10-7%
% in Humans1×10-7%

Atomic dimensions and structure
Atomic RadiusN/A
Covalent RadiusN/A
Van der Waals Radius186 pm
Crystal StructureBase Centered Orthorhombic
Lattice Angles
π/2, π/2, π/2
Lattice Constants
285.37, 586.95, 495.48 pm
Space Group NameCmcm
Space Group Number63

Nuclear Properties
Half-Life4.471×109 y
Lifetime6.4498×109 y
Isotopic Abundances
238U99.2745%

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