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Element Details

Element Description

A brittle, hard metal, resembling iron and nickel in appearance, cobalt has a magnetic permeability approximately two thirds that of iron. It is frequently obtained as a by-product of nickel, silver, lead, copper, and iron ores and is present in meteorites. Cobalt is often alloyed with other metals due to its unusual magnetic strength and is used in electroplating because of its appearance, hardness, and resistance to oxidation.

Property Name Property Value Property Name Property Value
Atomic Code (27Co58.93320) Covalent Radius 1.16Angstroms
CAS # 7440-48-4 Vickers Hardness @ 20°C 253
Brinell Hardness 125
Melting Point 1495°C Coefficient of Thermal Expansion 12.5x10-6K-1
Boiling Point 2927°C Electrical Resistivity 6.34µΩ-cm
Density 8.92g/cm3 Crystal Structure Hexagonal
Themal Conductivity 0.165cal/cm2/cm/s/°C Curie Temperature 1121°C
Specific Heat @ 25°C 0.1056cal/g°C Compressibility 0.50x10-6cm2/kg
Heat of Fusion 62.0cal/g Thermal Neutron Cross Section 34.8barns/atom
Heat of Vaporization 1500cal/g Poisson Ratio 0.32
Atomic Volume 6.7W/D Young's Modulus 30.6x106psi
First Ionization Energy 181K-cal/g-mole Tensile Strength (annealed) 37.0x103psi
Electronegativity 1.8Pauling's


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