Gold Top Hat Single Crystal

Formula: Au

Form: Single Crystal

Material: Gold

CAS Number: 7440-57-5

Commodity: Precious Metals

Purity: 99.999%

Top Section Thickness: 1mm

Bottom Section Thickness: 1mm

Inside Diameter: 8mm

Outside Diameter: 10mm

Goodfellow offers the Gold Top Hat Single Crystal in 14 variations. These high purity single crystals enable precise control over orientation for investigating fundamental materials properties. With no grain boundaries, they are ideal for use as x-ray and neutron monochromators or analyzers. The range also suits fundemental physics research and studies of catalytic chemistry. By providing gold in an oriented single crystal, new discoveries become possible across many fields.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

each

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 Precious Metals

Atomic Properties

Element	Value
Atomic number	79
Crystal structure	Face centred cubic
Electronic structure	Xe 4f¹⁴ 5d¹⁰ 6s¹
Valences shown	1,3
Atomic weight( amu )	196.9665
Thermal neutron absorption cross-section( Barns )	98.8
Photo-electric work function( eV )	4.8
Atomic radius - Goldschmidt( nm )	0.144
Ionisation potential( No./eV )	1/ 9.22
Ionisation potential( No./eV )	2/ 20.5

Mechanical Properties

Element	Value
Material condition	Soft
Material condition	Hard
Poisson's ratio	0.42
Poisson's ratio	0.42
Bulk modulus( GPa )	171
Bulk modulus( GPa )	171
Tensile modulus( GPa )	78.5
Tensile modulus( GPa )	78.5
Hardness - Vickers( kgf mm⁻² )	20-30
Hardness - Vickers( kgf mm⁻² )	60
Tensile strength( MPa )	130
Tensile strength( MPa )	220
Yield strength( MPa )	205
Yield strength( MPa )	-

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	2.20@20@20°C
Temperature coefficient( K⁻¹ )	0.004@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.74

Physical Properties

Element	Value
Boiling point( C )	3080
Density( gcm⁻³ )	19.3@20°C

Thermal Properties

Element	Value
Melting point( C )	1064.4
Latent heat of evaporation( J g⁻¹ )	1738
Latent heat of fusion( J g⁻¹ )	64.9
Specific heat( J K⁻¹ kg⁻¹ )	129@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	318@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	14.1@0-100°C

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Gold Top Hat Single Crystal

Tolerances

Material Properties for Precious Metals