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Gold (Au) Particles

Physical-Chemical Properties:

Ranking in order of abundance in earth crust: 75
Mean content in earth crust: 0.004 ppm (g/tonne)
Mean content in oceans: 4 · 10-6 ppm (g/tonne)
Residence time in oceans: 100 · 103 years
Radii of atoms (ppm): Atomic: 135
Covalent: 144
Density (g cm-3): 19.3
Molar volume ( cm-3): 10.21
Specif ic heat cp at 298 K (J K–1 kg–1): 129
Thermal conductivity (Wm–1K–1):
173 K: 324
273 K: 319
373 K: 313
575 K: 299
973 K: 272
Coefficient of linear expansion (K–1):
100 K: 11.8 · 10-6
293 K: 14.2· 10-6
500 K: 15.4 · 10-6
800 K: 17 · 10-6
Resistivity (nΩm):
78 K: 5
273 K: 20.5
373 K: 28.8
573 K: 46.3
973 K: 86
1336 K: 310
Mass magnetic susceptibility (m3 kg-1): 293 K: –1.78 · 10-9
Youngs modulus (G Pa): 78
Shear modulus (G Pa): 27
Bulk modulus (G Pa): 234
Poissons ratio: 0.44
Enthalpy of fusion ΔHfus at melting point (kJmol-1): 13.0
Enthalpy of vaporization ΔHvap at boiling point (kJmol-1): 325
Enthalpy of atomization ΔHat at 298 K (kJmol-1): 366
Entropy S0 at 298 K (J K-1mol-1): 47.40
Molar heat capacity Cp at temperature K (J K-1mol-1):
100 K: 21.4
298 K: 25.42
600 K: 26.8
1000 K: 28.9
2000 K: 29.3
2500 K: 29.3

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