Technical data for Gallium

Overview Name Gallium Symbol Ga Atomic Number 31 Atomic Weight 69.723 Density 5.904 g/cm3 Melting Point 29.76 °C Boiling Point 2204 °C Thermal properties Phase Solid Melting Point 29.76 °C Boiling Point 2204 °C Absolute Melting Point 302.91 K Absolute Boiling Point 2477 K Critical Pressure N/A Critical Temperature N/A Heat of Fusion 5.59 kJ/mol Heat of Vaporization 256 kJ/mol Specific Heat 371 J/(kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 29 W/(m K) Thermal Expansion 0.00012 K-1 Bulk physical properties Density 5.904 g/cm3 Density (Liquid) 6.095 g/cm3 Molar Volume 0.000011809 Brinell Hardness 60 MPa Mohs Hardness 1.5 Vickers Hardness N/A Bulk Modulus N/A Shear Modulus N/A Young Modulus N/A Poisson Ratio N/A Refractive Index N/A Speed of Sound 2740 m/s Thermal Conductivity 29 W/(m K) Thermal Expansion 0.00012 K-1 Reactivity Valence 3 Electronegativity 1.81 ElectronAffinity 28.9 kJ/mol Ionization Energies 578.8, 1979.3, 2963, 6180 kJ/mol Health and Safety DOT Hazard Class 8 DOT Numbers 2803 RTECS Number RTECSLW8600000 NFPA Label

Classifications Alternate Names None Names of Allotropes None Block p Group 13 Period 4 Series Poor Metal Electron Configuration [Ar]4s23d104p1 Color Silver Discovery 1875 in France Gas phase N/A CAS Number CAS7440-55-3 CID Number CID5360835 RTECS Number RTECSLW8600000 Electrical properties Electrical Type Conductor Electrical Conductivity 7.1×106 S/m Resistivity 1.4×10-7 m Ω Superconducting Point 1.083 Magnetic properties Magnetic Type Diamagnetic Curie Point N/A Mass Magnetic Susceptibility -3×10-9 m3/Kg Molar Magnetic Susceptibility -2.09×10-10 m3/mol Volume Magnetic Susceptibility -0.0000177 Abundances % in Universe 1×10-6% % in Sun 4×10-6% % in Meteorites 0.00076% % in Earth's Crust 0.0019% % in Oceans 3×10-9% % in Humans N/A Atomic dimensions and structure Atomic Radius 136 pm Covalent Radius 122 pm Van der Waals Radius 187 pm Crystal Structure Base Orthorhombic Lattice Angles π/2, π/2, π/2 Lattice Constants 451.97, 766.33, 452.6 pm Space Group Name Cmca Space Group Number 64 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 2P1/2 Neutron Cross Section 2.9 Neutron Mass Absorption 0.0015 Known Isotopes 56Ga, 57Ga, 58Ga, 59Ga, 60Ga, 61Ga, 62Ga, 63Ga, 64Ga, 65Ga, 66Ga, 67Ga, 68Ga, 69Ga, 70Ga, 71Ga, 72Ga, 73Ga, 74Ga, 75Ga, 76Ga, 77Ga, 78Ga, 79Ga, 80Ga, 81Ga, 82Ga, 83Ga, 84Ga, 85Ga, 86Ga Stable Isotopes 69Ga, 71Ga Isotopic Abundances 69Ga 60.108% 71Ga 39.892%