Tantalum Square Single Crystal

Tantalum Square Single Crystal delivers exceptional purity, chemical resistance, and high-temperature stability in a monocrystalline square geometry ideal for specialized electronic and high-vacuum applications. The perfect lattice structure ensures uniform thermal expansion and consistent electrical conductivity, critical for precision bonding, microfabrication, and semiconductor wafer processing. Industries use tantalum single-crystal squares for high-purity electrical contacts, electron beam system components, and crystal orientation standards. Research applications include crystallographic analysis, surface science experiments, and testing of lattice-dependent properties. The square format offers ease of integration into planar assemblies, while the monocrystalline nature ensures predictable performance in both experimental and industrial high-specification environments.

Formula: Ta
Percentage Purity: 99.999%
Thickness: 1mm
Size: 4x4mm
Orientation: -100
Orientation Accuracy: Approx. 0.1°
Polish: Polished
Surface Finish: =< 0.03µm Ra
CAS Number: 7440-25-7
UOM Code: 137-516-31
Legacy Code: TA002003
Distributor Code: GF13751631

SKU: 1000041396

Product Code: TA00-SC-000165

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Tolerances

Single Crystal

Orientation		See Item
Thickness		+2% / -1%
Length		+2% / -1%

Square

Size		+2% / -1%

Tolerances

Single Crystal

Orientation		See Item
Thickness		+2% / -1%
Length		+2% / -1%

Square

Size		+2% / -1%

Technical Data Sheet

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Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	73
Crystal structure	Body centred cubic
Electronic structure	Xe 4f¹⁴ 5d³ 6s²
Valences shown	2,3,4,5
Atomic weight( amu )	180.9479
Thermal neutron absorption cross-section( Barns )	22
Photo-electric work function( eV )	4.1
Natural isotope distribution( Mass No./% )	180/ 0.012
Natural isotope distribution( Mass No./% )	181/ 99.988
Atomic radius - Goldschmidt( nm )	0.147
Ionisation potential( No./eV )	1/ 7.88
Ionisation potential( No./eV )	2/ 16.2

Mechanical Properties

Element	Value
Material condition	Hard
Material condition	Soft
Poisson's ratio	0.342
Poisson's ratio	0.342
Bulk modulus( GPa )	196.3
Bulk modulus( GPa )	196.3
Tensile modulus( GPa )	185.7
Tensile modulus( GPa )	185.7
Hardness - Vickers( kgf mm⁻² )	200
Hardness - Vickers( kgf mm⁻² )	90
Tensile strength( MPa )	760
Tensile strength( MPa )	172-207
Yield strength( MPa )	705
Yield strength( MPa )	310-380

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	13.5@20@20°C
Superconductivity critical temperature( K )	4.47
Temperature coefficient( K⁻¹ )	0.0035@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.33

Physical Properties

Element	Value
Boiling point( C )	5425
Density( gcm⁻³ )	16.6@20°C

Thermal Properties

Element	Value
Melting point( C )	2996
Latent heat of evaporation( J g⁻¹ )	4165
Latent heat of fusion( J g⁻¹ )	174
Specific heat( J K⁻¹ kg⁻¹ )	140@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	57.5@0-100
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	6.5@0-100°C