Technical data for Tungsten

Overview Name Tungsten Symbol W Atomic Number 74 Atomic Weight 183.84 Density 19.25 g/cc Melting Point 3422.°C Boiling Point 5555.°C Thermal properties Phase Solid Melting Point 3422.°C Boiling Point 5555.°C Absolute Melting Point 3695.K Absolute Boiling Point 5828.K Critical Pressure N/A Critical Temperature N/A Heat of Fusion 35.KJ/mol Heat of Vaporization 800.KJ/mol Heat of Combustion N/A Specific Heat 132.J/(Kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 170.W/(m K) Thermal Expansion 4.5×10-6K-1 Bulk physical properties Density 19.25 g/cc Density (Liquid) 17.6 g/cc Molar Volume 9.5501×10-6 Brinell Hardness 2570.MPa Mohs Hardness 7.5MPa Vickers Hardness 3430.MPa Bulk Modulus 310.GPa Shear Modulus 161.GPa Young Modulus 411.GPa Poisson Ratio 0.28 Refractive Index N/A Speed of Sound 5174.m/s Thermal Conductivity 170.W/(m K) Thermal Expansion 4.5×10-6K-1 Reactivity Valence 6 Electronegativity 2.36 ElectronAffinity 78.6KJ/mol Ionization Energies 770., 1.7×103 KJ/mol Health and Safety Autoignition Point N/A Flashpoint N/A Heat of Combustion N/A DOT Hazard Class 4.1 DOT Numbers 3089 EU Number EU231-143-9 NFPA Fire Rating 2 NFPA Hazards N/A NFPA Health Rating 1 NFPA Reactivity Rating 1 RTECS Classes Reproductive Effector, Primary Irritant RTECS Number RTECSYO7175000 NFPA Label

Classifications Alternate Names Wolfram Names of Allotropes None Block d Group 6 Period 6 Electron Configuration [Xe]4f145d46s2 Color Gray Discovery 1783 in Spain Gas phase N/A CAS Number 7440-33-7 CID Number CID23964 Gmelin Number Gmelin16317 NSC Number N/A RTECS Number RTECSYO7175000 Electrical properties Electrical Type Conductor Electrical Conductivity 2.×107S/m Resistivity 5.×10-8m Ω Superconducting Point 0.015 Magnetic properties Magnetic Type Paramagnetic Curie Point N/A Mass Magnetic Susceptibility 3.9×10-9 Molar Magnetic Susceptibility 7.17×10-10 Volume Magnetic Susceptibility 0.0000751 Abundances % in Universe 5.×10-8% % in Sun 4.×10-7% % in Meteorites 0.000012% % in Earth's Crust 0.00011% % in Oceans 1.2×10-8% % in Humans N/A Atomic dimensions and structure Atomic Radius 193.pm Covalent Radius 146.pm Van der Waals Radius N/A Crystal Structure Body Centered Cubic Lattice Angles π/2, π/2, π/2 Lattice Constants 316.52, 316.52, 316.52 pm Space Group Name Im_ 3m Space Group Number 229 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 5D0 Neutron Cross Section 18.4 Neutron Mass Absorption 0.0036 Known Isotopes 158W, 159W, 160W, 161W, 162W, 163W, 164W, 165W, 166W, 167W, 168W, 169W, 170W, 171W, 172W, 173W, 174W, 175W, 176W, 177W, 178W, 179W, 180W, 181W, 182W, 183W, 184W, 185W, 186W, 187W, 188W, 189W, 190W, 191W, 192W Stable Isotopes 180W, 182W, 183W, 184W, 186W Isotopic Abundances 180W 0.12% 182W 26.5% 183W 14.31% 184W 30.64% 186W 28.43%