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Formula: Co
Form: Single Crystal
Material: Cobalt
CAS Number: 7440-48-4
Commodity: Metals
Purity:
99.99%
Thickness:
1mm
Hazard Pictogram:
GHS07,GHS08
Cobalt Square Single Crystal is 1 from a range of Goodfellow's single crystal products. Single crystals like this cobalt specimen are highly valued for properties such as their purity, lack of grain boundaries, and specific orientation. These attributes make cobalt single crystals ideal for use in fundamental research in fields like physics, catalytic chemistry, and materials science. For example, cobalt single crystals can serve as crystal monochromators or analyzers for x-rays and neutrons.
Health hazard/Hazardous to the ozone layer
Serious health hazard
Tolerances
Single Crystal
| Orientation | See Item | |
|---|---|---|
| Thickness | +2% / -1% | |
| Length | +2% / -1% |
Square
| Size | +2% / -1% |
|---|
Material Properties for Metals
Atomic Properties
| Element | Value |
|---|---|
| Atomic number | 27 |
| Crystal structure | Hexagonal close packed |
| Electronic structure | Ar 3d⁷ 4s² |
| Valences shown | 2, 3 |
| Atomic weight( amu ) | 58.9332 |
| Thermal neutron absorption cross-section( Barns ) | 37.5 |
| Photo-electric work function( eV ) | 5 |
| Atomic radius - Goldschmidt( nm ) | 0.125 |
| Ionisation potential( No./eV ) | 2/ 17.06 |
| Ionisation potential( No./eV ) | 4/ 51.3 |
| Ionisation potential( No./eV ) | 3/ 33.5 |
| Ionisation potential( No./eV ) | 1/ 79.5 |
| Ionisation potential( No./eV ) | 1/ 79.5 |
| Ionisation potential( No./eV ) | 6/ 102 |
Mechanical Properties
| Element | Value |
|---|---|
| Material condition | Hard |
| Material condition | Soft |
| Poisson's ratio | 0.32 |
| Poisson's ratio | 0.32 |
| Bulk modulus( GPa ) | 181.5 |
| Bulk modulus( GPa ) | 181.5 |
| Tensile modulus( GPa ) | 211 |
| Tensile modulus( GPa ) | 211 |
| Hardness - Vickers( kgf mm⁻² ) | 320 |
| Hardness - Vickers( kgf mm⁻² ) | 170 |
| Tensile strength( MPa ) | 1135 |
| Tensile strength( MPa ) | 760 |
| Yield strength( MPa ) | 345-485 |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 6.34@20@20°C |
| Temperature coefficient( K⁻¹ ) | 0.0066@0-100°C |
| Thermal emf against Pt (cold 0C - hot 100C)( mV ) | -1.33 |
Physical Properties
| Element | Value |
|---|---|
| Boiling point( C ) | 2870 |
| Density( gcm⁻³ ) | 8.9@20°C |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 1495 |
| Latent heat of evaporation( J g⁻¹ ) | 6490 |
| Latent heat of fusion( J g⁻¹ ) | 263 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 456@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 100@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 12.5@0-100°C |