Vendetta

Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge. Chapters: Iron, Nickel, Ferromagnetism, Dysprosium, Gadolinium, Cobalt, Magnetite, Rare-Earth Magnet, Ferrite, Neodymium Magnet, Samarium-cobalt Magnet, Ferromagnetic Material Properties, Ferrite, Permalloy, Magnetolithography, Yttrium Iron Garnet. Excerpt: item iron cobalt nickel 27Co Periodic table item Appearance item hard lustrous gray metal item General properties item Name , symbol , number : cobalt, Co, 27 item Element category : transition metal item Group , period , block : 9 , 4 , d item Standard atomic weight : 58.933195(5) g·mol item Electron configuration : 4s 3d item Electrons per shell : 2, 8, 15, 2 (Image ) item Physical properties item Color : metallic gray item Density (near r.t. ): 8.90 g·cm item Liquid density at m.p. : 7.75 g·cm item Melting point : 1768 K , 1495 °C , 2723 °F item Boiling point : 3200 K , 2927 °C , 5301 °F item Heat of fusion : 16.06 kJ·mol item Heat of vaporization : 377 kJ·mol item Specific heat capacity : (25 °C) 24.81 J·mol ·K item Vapor pressure item P /Pa: 1: 10: 100: 1 k: 10 k: 100 k item Atomic properties item Oxidation states : 5, 4 , 3 , 2 , 1, -1 (amphoteric oxide) item Electronegativity : 1.88 (Pauling scale) item Ionization energies (more ): 1st: 760.4 kJ·mol item 2nd: 1648 kJ·mol item 3rd: 3232 kJ·mol item Atomic radius : 125 pm item Covalent radius : 126 ±3 (low spin), 150 ±7 (high spin) pm item Miscellanea item Crystal structure : hexagonal item Magnetic ordering : ferromagnetic item Electrical resistivity : (20 °C) 62.4 n ·m item Thermal conductivity : (300 K) 100 W·m ·K item Thermal expansion : (25 °C) 13.0 µm·m ·K item Speed of sound (thin rod): (20 °C) 4720 m/s item Young's modulus : 209 GPa item Shear modulus : 75 GPa item Bulk modulus : 180 GPa item Poisson ratio : 0.31 item Mohs hardness : 5.0 item Vickers hardness : 1043 MPa i...