Technical data for Platinum

Overview Name Platinum Symbol Pt Atomic Number 78 Atomic Weight 195.078 Density 21.09 g/cc Melting Point 1768.3°C Boiling Point 3825.°C Thermal properties Phase Solid Melting Point 1768.3°C Boiling Point 3825.°C Absolute Melting Point 2041.4K Absolute Boiling Point 4098.K Critical Pressure N/A Critical Temperature N/A Heat of Fusion 20.KJ/mol Heat of Vaporization 490.KJ/mol Heat of Combustion N/A Specific Heat 133.J/(Kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 72.W/(m K) Thermal Expansion 8.8×10-6K-1 Bulk physical properties Density 21.09 g/cc Density (Liquid) 19.77 g/cc Molar Volume 9.2498×10-6 Brinell Hardness 392.MPa Mohs Hardness 3.5MPa Vickers Hardness 549.MPa Bulk Modulus 230.GPa Shear Modulus 61.GPa Young Modulus 168.GPa Poisson Ratio 0.38 Refractive Index N/A Speed of Sound 2680.m/s Thermal Conductivity 72.W/(m K) Thermal Expansion 8.8×10-6K-1 Reactivity Valence 6 Electronegativity 2.28 ElectronAffinity 205.3KJ/mol Ionization Energies 870., 1791. 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 EU231-116-1 NFPA Fire Rating 2 NFPA Hazards N/A NFPA Health Rating 1 NFPA Reactivity Rating 0 RTECS Classes Tumorigen RTECS Number RTECSTP2160000 NFPA Label

Classifications Alternate Names None Names of Allotropes None Block d Group 10 Period 6 Electron Configuration [Xe]4f145d96s1 Color Gray Discovery 1735 in Peru Gas phase N/A CAS Number CAS7440-06-4 CID Number CID23939 Gmelin Number Gmelin79607 NSC Number N/A RTECS Number RTECSTP2160000 Electrical properties Electrical Type Conductor Electrical Conductivity 9.4×106S/m Resistivity 1.1×10-7m Ω Superconducting Point N/A Magnetic properties Magnetic Type Paramagnetic Curie Point N/A Mass Magnetic Susceptibility 1.22×10-8 Molar Magnetic Susceptibility 2.38×10-9 Volume Magnetic Susceptibility 0.0002573 Abundances % in Universe 5.×10-7% % in Sun 9.×10-7% % in Meteorites 0.000098% % in Earth's Crust 3.7×10-6% % in Oceans N/A % in Humans N/A Atomic dimensions and structure Atomic Radius 177.pm Covalent Radius 128.pm Van der Waals Radius 175.pm Crystal Structure Face Centered Cubic Lattice Angles π/2, π/2, π/2 Lattice Constants 392.42, 392.42, 392.42 pm Space Group Name Fm_ 3m Space Group Number 225 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 3D3 Neutron Cross Section 10. Neutron Mass Absorption 0.002 Known Isotopes 166Pt, 167Pt, 168Pt, 169Pt, 170Pt, 171Pt, 172Pt, 173Pt, 174Pt, 175Pt, 176Pt, 177Pt, 178Pt, 179Pt, 180Pt, 181Pt, 182Pt, 183Pt, 184Pt, 185Pt, 186Pt, 187Pt, 188Pt, 189Pt, 190Pt, 191Pt, 192Pt, 193Pt, 194Pt, 195Pt, 196Pt, 197Pt, 198Pt, 199Pt, 200Pt, 201Pt, 202Pt Stable Isotopes 192Pt, 194Pt, 195Pt, 196Pt, 198Pt Isotopic Abundances 190Pt 0.014% 192Pt 0.782% 194Pt 32.967% 195Pt 33.832% 196Pt 25.242% 198Pt 7.163%