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Formula: Nb
Form: Single Crystal
Material: Niobium
CAS Number: 7440-03-1
Commodity: Metals
Purity:
99.999%
Top Section Thickness:
1mm
Bottom Section Thickness:
1mm
Inside Diameter:
8mm
Outside Diameter:
10mm
Goodfellow offers a range of Niobium single crystals, including the Niobium Top Hat Single Crystal, available in 15 variations. As a high purity single crystal with no grain boundaries, Niobium Top Hat Crystals are ideal for applications in fundemental research. For example, they can serve as crystal monochromators or analyzers for x-rays and neutrons. The specific orientation and purity of these single crystals also make them useful for investigating materials properties and as electrodes in catalytic chemistry research.
Tolerances
Single Crystal
| Orientation | See Item | |
|---|---|---|
| Thickness | +2% / -1% | |
| Length | +2% / -1% |
Top Hat
| Inside Diameter | +2% / -1% | |
|---|---|---|
| Outside Diameter | +2% / -1% | |
| Bottom Section Thickness | +2% / -1% | |
| Top Section Thickness | +2% / -1% |
Material Properties for Metals
Atomic Properties
| Element | Value |
|---|---|
| Atomic number | 41 |
| Crystal structure | Body centred cubic |
| Electronic structure | Kr 4d⁴ 5s¹ |
| Valences shown | 2, 3, 4, 5 |
| Atomic weight( amu ) | 92.9064 |
| Thermal neutron absorption cross-section( Barns ) | 1.15 |
| Photo-electric work function( eV ) | 4.3 |
| Atomic radius - Goldschmidt( nm ) | 0.147 |
| Ionisation potential( No./eV ) | 3/ 25.0 |
| Ionisation potential( No./eV ) | 2/ 14.3 |
| Ionisation potential( No./eV ) | 6/ 103 |
| Ionisation potential( No./eV ) | 1/ 6.88 |
| Ionisation potential( No./eV ) | 4/ 38.3 |
| Ionisation potential( No./eV ) | 5/ 50.5 |
Mechanical Properties
| Element | Value |
|---|---|
| Material condition | Hard |
| Material condition | Soft |
| Poisson's ratio | 0.397 |
| Poisson's ratio | 0.397 |
| Bulk modulus( GPa ) | 170.3 |
| Bulk modulus( GPa ) | 170.3 |
| Tensile modulus( GPa ) | 104.9 |
| Tensile modulus( GPa ) | 104.9 |
| Izod toughness( J m⁻¹ ) | 10-120 |
| Hardness - Vickers( kgf mm⁻² ) | 115 |
| Hardness - Vickers( kgf mm⁻² ) | 160 |
| Tensile strength( MPa ) | 330 |
| Tensile strength( MPa ) | 585 |
| Yield strength( MPa ) | 550 |
| Yield strength( MPa ) | 240 |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 16@20@20°C |
| Superconductivity critical temperature( K ) | 9.25 |
| Temperature coefficient( K⁻¹ ) | 0.0026@0-100°C |
Physical Properties
| Element | Value |
|---|---|
| Boiling point( C ) | 4742 |
| Density( gcm⁻³ ) | 8.57@20°C |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 2468 |
| Latent heat of evaporation( J g⁻¹ ) | 7360 |
| Latent heat of fusion( J g⁻¹ ) | 290 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 268@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 53.7@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 7.2@0-100°C |