Technical data for Tungsten

Overview Name Tungsten Symbol W Atomic Number 74 Atomic Weight 183.84 Density 19.25 g/cm3 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 Specific Heat 132 J/(kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 170 W/(m K) Thermal Expansion 4.5×10-6 K-1 Bulk physical properties Density 19.25 g/cm3 Density (Liquid) 17.6 g/cm3 Molar Volume 9.5501×10-6 Brinell Hardness 2570 MPa Mohs Hardness 7.5 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 4.5×10-6 K-1 Reactivity Valence 6 Electronegativity 2.36 ElectronAffinity 78.6 kJ/mol Ionization Energies 770, 1700 kJ/mol Health and Safety DOT Hazard Class 4.1 DOT Numbers 3089 RTECS Number RTECSYO7175000 NFPA Label

Classifications Alternate Names Wolfram Names of Allotropes None Block d Group 6 Period 6 Series Transition Metal Electron Configuration [Xe]6s24f145d4 Color Gray Discovery 1783 in Spain Gas phase N/A CAS Number CAS7440-33-7 CID Number CID23964 RTECS Number RTECSYO7175000 Electrical properties Electrical Type Conductor Electrical Conductivity 2×107 S/m Resistivity 4.999999999997×10-8 m Ω Superconducting Point 0.015 Magnetic properties Magnetic Type Paramagnetic Curie Point N/A Mass Magnetic Susceptibility 4.59×10-9 m3/Kg Molar Magnetic Susceptibility 8.44×10-10 m3/mol Volume Magnetic Susceptibility 0.0000884 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 162 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%