Technical data for Cerium

Overview Name Cerium Symbol Ce Atomic Number 58 Atomic Weight 140.116 Density 6.689 g/cm3 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 5.5 kJ/mol Heat of Vaporization 350 kJ/mol Specific Heat 192 J/(kg K)[note] Adiabatic Index N/A Neel Point 12.5 K Thermal Conductivity 11 W/(m K) Thermal Expansion 6.3×10-6 K-1 Bulk physical properties Density 6.689 g/cm3 Density (Liquid) 6.55 g/cm3 Molar Volume 0.000020947 Brinell Hardness 412 MPa Mohs Hardness 2.5 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 2100 m/s Thermal Conductivity 11 W/(m K) Thermal Expansion 6.3×10-6 K-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 DOT Hazard Class 4.1 DOT Numbers 1333 RTECS Number N/A NFPA Label

Classifications Alternate Names None Names of Allotropes None Block f Group N/A Period 6 Series Lanthanide Electron Configuration [Xe]6s24f15d1 Color Silver Discovery 1803 in Germany and Sweden Gas phase N/A CAS Number CAS7440-45-1 CID Number CID23974 RTECS Number N/A Electrical properties Electrical Type Conductor Electrical Conductivity 1.4×106 S/m Resistivity 7.5×10-7 m Ω Superconducting Point 0.022 Magnetic properties Magnetic Type Paramagnetic Curie Point N/A Mass Magnetic Susceptibility 2.2×10-7 m3/Kg Molar Magnetic Susceptibility 3.0826×10-8 m3/mol 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 204 pm 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%