Technical data for Aluminum

Overview Name Aluminum Symbol Al Atomic Number 13 Atomic Weight 26.9815385 Density 2.7 g/cm3 Melting Point 660.32 °C Boiling Point 2519 °C Thermal properties Phase Solid Melting Point 660.32 °C Boiling Point 2519 °C Absolute Melting Point 933.47 K Absolute Boiling Point 2792 K Critical Pressure N/A Critical Temperature N/A Heat of Fusion 10.7 kJ/mol Heat of Vaporization 293 kJ/mol Specific Heat 904 J/(kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 235 W/(m K) Thermal Expansion 0.0000231 K-1 Bulk physical properties Density 2.7 g/cm3 Density (Liquid) 2.375 g/cm3 Molar Volume 9.99×10-6 Brinell Hardness 245 MPa Mohs Hardness 2.75 Vickers Hardness 167 MPa Bulk Modulus 76 GPa Shear Modulus 26 GPa Young Modulus 70 GPa Poisson Ratio 0.35 Refractive Index N/A Speed of Sound 5100 m/s Thermal Conductivity 235 W/(m K) Thermal Expansion 0.0000231 K-1 Reactivity Valence 3 Electronegativity 1.61 ElectronAffinity 42.5 kJ/mol Ionization Energies 577.5, 1816.7, 2744.8, 11577, 14842, 18379, 23326, 27465, 31853, 38473 kJ/mol Health and Safety DOT Hazard Class 4.3 DOT Numbers 1396 RTECS Number RTECSBD0330000 NFPA Label

Classifications Alternate Names Aluminium Names of Allotropes None Block p Group 13 Period 3 Series Poor Metal Electron Configuration [Ne]3s23p1 Color Silver Discovery 1825 in Denmark Gas phase N/A CAS Number CAS7429-90-5 CID Number CID5359268 RTECS Number RTECSBD0330000 Electrical properties Electrical Type Conductor Electrical Conductivity 3.8×107 S/m Resistivity 2.6×10-8 m Ω Superconducting Point 1.175 Magnetic properties Magnetic Type Paramagnetic Curie Point N/A Mass Magnetic Susceptibility 7.8×10-9 m3/Kg Molar Magnetic Susceptibility 2.1×10-10 m3/mol Volume Magnetic Susceptibility 0.0000211 Abundances % in Universe 0.005% % in Sun 0.006% % in Meteorites 0.9% % in Earth's Crust 8.1% % in Oceans 5×10-7% % in Humans 0.00009% Atomic dimensions and structure Atomic Radius 118 pm Covalent Radius 121 pm Van der Waals Radius N/A Crystal Structure Face-centered Cubic Lattice Angles π/2, π/2, π/2 Lattice Constants 404.95, 404.95, 404.95 pm Space Group Name Fm_ 3m Space Group Number 225 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 2P1/2 Neutron Cross Section 0.233 Neutron Mass Absorption 0.03 Known Isotopes 21Al, 22Al, 23Al, 24Al, 25Al, 26Al, 27Al, 28Al, 29Al, 30Al, 31Al, 32Al, 33Al, 34Al, 35Al, 36Al, 37Al, 38Al, 39Al, 40Al, 41Al, 42Al Stable Isotopes 27Al Isotopic Abundances 27Al 100%