Technical data for Rhenium

Overview
NameRhenium
SymbolRe
Atomic Number75
Atomic Weight186.207
Density21.02 g/cm3
Melting Point3186 °C
Boiling Point5596 °C

Thermal properties
PhaseSolid
Melting Point3186 °C
Boiling Point5596 °C
Absolute Melting Point3459 K
Absolute Boiling Point5869 K
Heat of Fusion33 kJ/mol
Heat of Vaporization705 kJ/mol
Heat of CombustionN/A
Specific Heat137 J/(kg K)[note]
Thermal Conductivity48 W/(m K)
Thermal Expansion6.2×10-6 K-1

Bulk physical properties
Density21.02 g/cm3
Density (Liquid)18.9 g/cm3
Molar Volume8.85856×10-6
Brinell Hardness1320 MPa
Mohs Hardness7 MPa
Vickers Hardness2450 MPa
Bulk Modulus370 GPa
Shear Modulus178 GPa
Young Modulus463 GPa
Poisson Ratio0.3
Speed of Sound4.7×103 m/s
Thermal Conductivity48 W/(m K)
Thermal Expansion6.2×10-6 K-1

Reactivity
Valence7
Electronegativity1.9
ElectronAffinity14.5 kJ/mol
Ionization Energies
760, 1260, 2510, 3640 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockd
Group7
Period6
Electron Configuration[Xe]4f145d56s2
ColorGray
Discovery
1925 in Germany
Gas phaseN/A
CAS NumberCAS7440-15-5

Electrical properties
Electrical TypeConductor
Electrical Conductivity5.6×106 S/m
Resistivity1.8×10-7 m Ω
Superconducting Point1.7

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic Susceptibility4.6×10-9
Molar Magnetic Susceptibility8.57×10-10
Volume Magnetic Susceptibility0.0000967

Abundances
% in Universe2×10-8%
% in Sun1×10-8%
% in Meteorites4.9×10-6%
% in Earth's Crust2.6×10-7%
% in Oceans1×10-10%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius188 pm
Covalent Radius159 pm
Van der Waals RadiusN/A
Crystal StructureSimple Hexagonal
Lattice Angles
π/2, π/2, 2 π/3
Lattice Constants
276.1, 276.1, 445.6 pm
Space Group NameP63/mmc
Space Group Number194

Nuclear Properties
Half-LifeStable
LifetimeStable
Stable Isotopes
185Re
Isotopic Abundances
185Re37.4%
187Re62.6%

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