Technical data for Cerium

Overview Name Cerium Symbol Ce Atomic Number 58 Atomic Weight 140.116 Density 6.689 g/cc Melting Point 798.°C Boiling Point 3360.°C Thermal properties Phase Solid Melting Point 798.°C Boiling Point 3360.°C Absolute Melting Point 1071.K Absolute Boiling Point 3633.K Critical Pressure N/A Critical Temperature N/A Heat of Fusion 5.5KJ/mol Heat of Vaporization 350.KJ/mol Heat of Combustion N/A Specific Heat 192.J/(Kg K)[note] Adiabatic Index N/A Neel Point 12.5K Thermal Conductivity 11.W/(m K) Thermal Expansion 6.3×10-6K-1 Bulk physical properties Density 6.689 g/cc Density (Liquid) 6.55 g/cc Molar Volume 0.000020947 Brinell Hardness 412.MPa Mohs Hardness 2.5MPa Vickers Hardness 270.MPa Bulk Modulus 22.GPa Shear Modulus 14.GPa Young Modulus 34.GPa Poisson Ratio 0.24 Refractive Index N/A Speed of Sound 2.1×103m/s Thermal Conductivity 11.W/(m K) Thermal Expansion 6.3×10-6K-1 Reactivity Valence 4 Electronegativity 1.12 ElectronAffinity 50.KJ/mol Ionization Energies 534.4, 1050., 1949., 3547., 6325., 7490. KJ/mol Health and Safety Autoignition Point N/A Flashpoint N/A Heat of Combustion N/A DOT Hazard Class 4.1 DOT Numbers 1333 EU Number EU231-154-9 NFPA Fire Rating 3 NFPA Hazards N/A NFPA Health Rating 2 NFPA Reactivity Rating 2 RTECS Classes N/A RTECS Number RTECSFK4850000 NFPA Label

Classifications Alternate Names None Names of Allotropes None Block f Group N/A Period 6 Electron Configuration [Xe]4f15d16s2 Color Silver Discovery 1803 in Germany and Sweden Gas phase N/A CAS Number CAS7440-45-1 CID Number CID23974 Gmelin Number Gmelin16275 NSC Number NSC158935 RTECS Number RTECSFK4850000 Electrical properties Electrical Type Conductor Electrical Conductivity 1.4×106S/m Resistivity 7.4×10-7m Ω Superconducting Point 0.022 Magnetic properties Magnetic Type Paramagnetic Curie Point N/A Mass Magnetic Susceptibility 2.2×10-7 Molar Magnetic Susceptibility 3.0826×10-8 Volume Magnetic Susceptibility 0.0014716 Abundances % in Universe 1.×10-6% % in Sun 4.×10-7% % in Meteorites 0.000075% % in Earth's Crust 0.006% % in Oceans 1.2×10-10% % in Humans N/A Atomic dimensions and structure Atomic Radius N/A Covalent Radius N/A Van der Waals Radius N/A Crystal Structure Simple Hexagonal Lattice Angles π/2, π/2, 2 π/3 Lattice Constants 362., 362., 599. pm Space Group Name P63/mmc Space Group Number 194 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 1G4 Neutron Cross Section 0.6 Neutron Mass Absorption 0.00021 Known Isotopes 119Ce, 120Ce, 121Ce, 122Ce, 123Ce, 124Ce, 125Ce, 126Ce, 127Ce, 128Ce, 129Ce, 130Ce, 131Ce, 132Ce, 133Ce, 134Ce, 135Ce, 136Ce, 137Ce, 138Ce, 139Ce, 140Ce, 141Ce, 142Ce, 143Ce, 144Ce, 145Ce, 146Ce, 147Ce, 148Ce, 149Ce, 150Ce, 151Ce, 152Ce, 153Ce, 154Ce, 155Ce, 156Ce, 157Ce Stable Isotopes 136Ce, 138Ce, 140Ce, 142Ce Isotopic Abundances 136Ce 0.185% 138Ce 0.251% 140Ce 88.45% 142Ce 11.114%