Technical data for Gallium

Overview
NameGallium
SymbolGa
Atomic Number31
Atomic Weight69.723
Density5.904 g/cm3
Melting Point29.76 °C
Boiling Point2204 °C

Thermal properties
PhaseSolid
Melting Point29.76 °C
Boiling Point2204 °C
Absolute Melting Point302.91 K
Absolute Boiling Point2477 K
Heat of Fusion5.59 kJ/mol
Heat of Vaporization256 kJ/mol
Heat of CombustionN/A
Specific Heat371 J/(kg K)[note]
Thermal Conductivity29 W/(m K)
Thermal Expansion0.00012 K-1

Bulk physical properties
Density5.904 g/cm3
Density (Liquid)6.095 g/cm3
Molar Volume0.000011809
Brinell Hardness60 MPa
Mohs Hardness1.5 MPa
Speed of Sound2740 m/s
Thermal Conductivity29 W/(m K)
Thermal Expansion0.00012 K-1

Reactivity
Valence3
Electronegativity1.81
ElectronAffinity28.9 kJ/mol
Ionization Energies
578.8, 1979.3, 2963, 6180 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockp
Group13
Period4
Electron Configuration[Ar]3d104s24p1
ColorSilver
Discovery
1875 in France
Gas phaseN/A
CAS NumberCAS7440-55-3

Electrical properties
Electrical TypeConductor
Electrical Conductivity7.1×106 S/m
Resistivity1.4×10-7 m Ω
Superconducting Point1.083

Magnetic properties
Magnetic TypeDiamagnetic
Curie PointN/A
Mass Magnetic Susceptibility-3×10-9
Molar Magnetic Susceptibility-2.09×10-10
Volume Magnetic Susceptibility-0.0000177

Abundances
% in Universe1×10-6%
% in Sun4×10-6%
% in Meteorites0.00076%
% in Earth's Crust0.0019%
% in Oceans3×10-9%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius136 pm
Covalent Radius126 pm
Van der Waals Radius187 pm
Crystal StructureBase Centered Orthorhombic
Lattice Angles
π/2, π/2, π/2
Lattice Constants
451.97, 766.33, 452.6 pm
Space Group NameCmca
Space Group Number64

Nuclear Properties
Half-LifeStable
LifetimeStable
Stable Isotopes
69Ga, 71Ga
Isotopic Abundances
69Ga60.108%
71Ga39.892%

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