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Platinum

Composition  
Platinum (Pt)     100 % 
 
Physical  
Boiling Point   3800 to 4530 °C 
  [Notes]
Conductivity - IACS (100% Cu)     16 %IACS 
  [Notes]
Diffusivity v Temperature     0.2525 m^2/s 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Electrical Conductivity v Temperature     0.0009852 1/ohm.cm 
[Plot graph]   [Notes]
  Parameters :  Temperature = 20 °C
Electrical Resistivity @ RT     10.3 µohm.cm 
  [Notes]
Electrical Resistivity v Temperature     10.19 µohm.cm 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Emissivity   0.047 to 0.35  
  [Notes]
Emissivity v Temperature   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Hall Constant     -2.2 cm^3/Amp/sec 
  [Notes]
Magnetic Susceptibility @ RT     0.0002019  
  [Notes]
Mass Susceptibility @ RT   9.71e-10 to 9.8e-10 m^3/kg 
  [Notes]
Mass Susceptibility @ 1000°C     3.6e-10 m^3/kg 
  [Notes]
Melting Point   2041 to 2045  
  [Notes]
Melting Point v Pressure   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Pressure = 1000 MPa
Reflectance v Wavelength     58.4 % 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Wavelength = 500 nm
Specific Heat v Temperature     0.03163  
[Plot graph]   [Notes]
  Parameters :  Temperature = 20 °C
T.C.R.   0.0039 to 0.00393 1/K 
  [Notes]
Thermal Conductivity @ RT   69.08 to 74.1 W/m.K 
  [Notes]
Thermal Conductivity @ 727°C   76.9 to 78.1 W/m.K 
  [Notes]
Thermal Conductivity v Temperature     71.18 W/m.K 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Thermal EMF v. Pt v Temperature   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Thermal Expansion v Temperature     0.0000089 1/K 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Thermionic emission   64 to 130 A/cm^2/K^2 
  [Notes]
Volume change on melting     6.5  
  [Notes]
Work Function   5.27 to 5.4 eV 
  [Notes]
Fundamental  
Absorption Cross Section     9 Barns 
  [Notes]
Atomic Number     78  
  [Notes]
Atomic Radius     0.139 nm 
  [Notes]
Atomic Volume   0.00000909 to 0.0000091  
  [Notes]
Atomic Weight     195.1 m^3/mol 
  [Notes]
Colour   White.
  [Notes]
Covalent Radius     0.13 nm 
  [Notes]
Crystal Structure   FCC
  [Notes]
Density @ RT     2.145e4 kg/m^3 
  [Notes]
Density as Liquid   1.86e4 to 1.98e4 kg/m^3 
  [Notes]
Ductile/brittle transition     -196 °C 
  [Notes]
Enthalpy of Sublimation v Temperature     555.3 kJ/mol 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Entropy   41.63 to 41.9 J/mol.K 
  [Notes]
First Ionisation Potential   8.9 to 9 eV 
  [Notes]
Heat Capacity v Temperature     0.03182 cal/g.K 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Heat of Vapourisation   469.2 to 565.2 kJ/mol 
  [Notes]
Heats of Transition     19.65 J/mol 
  [Notes]
Interatomic Distance 1     0.2776 nm 
  [Notes]
Interatomic Distance 2     0.2776 nm 
 
Ionic Radius   0.065 to 0.08 nm 
  [Notes]
Isotopic abundance  

Isotope Pt 190 - 0.0127%
Isotope Pt 192 - 0.78%
Isotope Pt 196 - 25.3%
Isotope Pt 194 - 32.9%
Isotope Pt 195 - 33.8%
Isotope Pt 198 - 7.21%

  [Notes]
Latent Heat of Fusion   19.6 to 19.68 kJ/mol 
  [Notes]
Lattice constant a     0.3923 nm 
  [Notes]
Molar Heat Capacity v Temperature     25.75 J/mol.K 
[Plot graph]   [Notes]
  Parameters :  Temperature = 20 °C
Number of Isotopes     6  
  [Notes]
Surface Tension     1780 mN/m 
  [Notes]
Therm. Neutron. Cap. X sec.   8.8 to 9 Barns 
  [Notes]
Vapour Press. at Melting Point     0.0001 torr 
  [Notes]
Vapour Pressure Coeff. (A)   2.85e4 to 2.92e4  
  [Notes]
Vapour Pressure Coeff. (B)   13.24 to 14.3  
  [Notes]
Vapour Pressure Coeff. (C)   -1.26 to -0.855  
  [Notes]
Chemical  
A.C. corrosion resistance   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Current Density = 12 mA/cm^-2
Chemical corrosion resistance v Temperature   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
D.C. corrosion resistance (54 mA/cm^2)   8 to 9 mg/amp/yr 
  [Notes]
D.C. corrosion resistance (535 mA/cm^2)   5 to 7 mg/amp/yr 
  [Notes]
Electrochem. Oxidn. Potential     -1.2 V 
  [Notes]
Electronegativity     2.2  
  [Notes]
Elemental abundance     0.01 ppm 
  [Notes]
Hydrogen Solubility v Temperature   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Oxide reaction affinity  

Reaction with Cr2O3 under hydrogen - 1273.15K
Reaction with Al2O3 under hydrogen - 1373.15K
Reaction with B2O3 under hydrogen - 1373.15K
Reaction with MgO under hydrogen - 1373.15K
Reaction with SiO2 under hydrogen - 1373.15K
Reaction with BaO under hydrogen - 1473.15K
Reaction with CaO under hydrogen - 1473.15K
Reaction with Sc2O3 under hydrogen - 1473.15K
Reaction with SrO under hydrogen - 1473.15K
Reaction with TiO2 under hydrogen - 1473.15K
Reaction with Y2O3 under hydrogen - 1473.15K
Reaction with Li2O under hydrogen - 1173.15K

  [Notes]
Oxidation Resistance (2200°F)   0.111 to 0.284 g/m^2/hr 
  [Notes]
Oxidation Resistance (2550°F)   0.447 to 1.082 g/m^2/hr 
  [Notes]
Oxidation Resistance (2880°F)     1.218 g/m^2/hr 
  [Notes]
Oxidation States  

2, The commonest are II and IV.

  [Notes]
Mechanical  
0.2% Proof Stress @ RT (Annealed)   48.95 to 49.03 MPa 
  [Notes]
0.2% Proof Stress v Temperature     49.03 MPa 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Annealing Time   720 to 1800 s 
  [Notes]
Bulk Modulus   228 to 275 GPa 
  [Notes]
Creep Rate   0.000009 to 5 %/hr 
  [Notes]
Creep Rate @ 1000°C     0.04167 %/hr 
  [Notes]
Creep Rate v Temperature   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Creep Resistance v Temperature     121.5 MPa 
[Plot graph]   [Notes]
  Parameters :  Time = 100 hr , Temperature = 20 °C
Erichsen Cup Test     6.2 mm 
  [Notes]
Forging Temperature   850 to 1000 °C 
  [Notes]
Hardness @ RT (Annealed)   5.608 to 40 HV 
  [Notes]
Hardness @ RT (As cast)     43 HV 
  [Notes]
Hardness @ RT (Hardened)     137 HV 
  [Notes]
Hardness v Cold Work     91 HV 
[Plot graph]   [Notes]
  Parameters :  Temperature = 20 °C , Cold Working = 20 %
Hardness v Temperature   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Limit of proportionality v Cold Work     304 MPa 
[Plot graph]   [Notes]
  Parameters :  Temperature = 20 °C , Cold Working = 20 %
Limit of proportionality v Temperature     160.2 MPa 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Min Hardness   39.77 to 40 HV 
  [Notes]
Max Hardness   42 to 42.83 HV 
  [Notes]
Modulus of Rigidity   60.67 to 61 GPa 
  [Notes]
Modulus of Rigidity (Annealed)   60.67 to 65.7 GPa 
  [Notes]
Modulus of Rigidity (Work-hardened)     58.61 GPa 
  [Notes]
Poisson's Ratio   0.36 to 0.39  
  [Notes]
Reduction of Area v Temperature     93.79 % 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Re-Crystallisation Temp.     525 °C 
  [Notes]
Specific strength     1.093 MPa.cm^3/g 
  [Notes]
Stress Rupture v Temperature   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Load = 9.653 MPa , Temperature = 20 °C
Stress to Rupture v Temperature   Out Of Range
[Plot graph]   [Notes]
  Parameters :  Time = 100 hr , Condition = Condition 1 , Temperature = 20 °C
Tensile Elongation @ RT     2 % 
  [Notes]
Tensile Elongation @ RT (Annealed)   35 to 40 % 
  [Notes]
Therm. Coeff. of volume expn.     0.000162 1/°C 
  [Notes]
Ultimate Tensile Strength @ RT     224.1 MPa 
  [Notes]
Ultimate Tensile Strength @ RT (Annealed)   124.1 to 245.2 MPa 
  [Notes]
Ultimate Tensile Strength v Cold Work     343.2 MPa 
[Plot graph]   [Notes]
  Parameters :  Temperature = 20 °C , Cold Working = 20 %
Ultimate Tensile Strength v Temperature     124.3 MPa 
[Plot graph]   [Notes]
  Parameters :  Condition = Condition 1 , Temperature = 20 °C
Young's Modulus @ RT   168 to 171.6