• Class: Transition Metals
• Period: 6
• IUPAC group: 10
• Traditional: VIII

• Discovered in: 1735 by de Ulloa
• Origin of name: Spanish: plaTina, (Silver)
• Historical or alternate name:

Occurs native & with sperrylite

Lustrous, Silvery white metal. Malleable and ductile. Resists Oxygen and water.

• Atmosphere: ~0.0 ppm
• Primitive mantle: 0.0087 ppm
• Sea water: trace ppm
• Metallic meteorite: 0.953 ppm
• ConTinental crust: 0.01 ppm
• Solar photosphere: 1.75 log of abundance
• Oceanic crust: 0.0023 ppm
• Solar system: 1.37 relative to Si=1.0e6

   Hazards

Compounds toxic by ingestion. Irritant by skin contact..

• Lower:
• Upper:0.01

Platinum Physical Properties

 Transitional Data

• State: Solid
• Density: 21.45 g/cm3

 Molar enthalpy

• Atomization: 564.42 kJ mol-1
• Fusion: 19.7 kJ mol-1
• Vaporization: 469 kJ mol-1

 Transition points

• MelTing point: 2045.0 K
• Boiling point: 3560.0 K
• Critical temperature: 8450.0 K

 Molar properties

• Atomic weight: 195.08 g/mole
• Molar volume: 9.148 cm3 mol-1

 Crystal structure sequence

face-centered-cubic

 Thermodynamics

• State: solid
  • Enthalpy 0
  • Gibbs function 0
  • Entropy 41.63
  • Heat Capacity 25.86

• State: gas
  • Enthalpy 565.3
  • Gibbs function 520.5
  • Entropy 192.406
  • Heat Capacity 25.531

 Miscellaneous physical

• Electrical resistivity: 10.6 µ-ohms/cm
• Debye temperature: 240.0 K
• Thermal conductivity: 71.6 W / m / K
• Coefficient of linear expansion: 8.8Coef. per K
• Mass magnetic susceptibility: 1.301e-8
• X-ray diffraction mass absorption coefficients:
• CuK: 200 (µ/p)/cm2 g-1
• MoK: 113 (µ/p)/cm2 g-1

Platinum Chemical Properties

 Chemical basics:

• Oxidation states: +2 +4 +5
• Molecular wt: 195.08 g/mole

 Radii

• Covalent: 129 pm
• Atomic: 139.0 pm
• Van der Waals: pm

 Ions:

• ion: +2 pm 80.0
• ion: +4 pm 62.5
• ion: +5 pm 57.0

 Covalent bonds

 Effective nuclear charge

• Slater: 4.05
• Clementi: 10.75
• Froese-Fischer: 15.65

 Electronegativity

• Pauling: 2.2
• Allred-Rochow: 1.44

 Standard reactions

Platinum Nuclear Properties

• Known 32
• Listed 9

• Known 173 - 200
• Listed 188 - 198

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 10.2 days
  • Decay mode: E.C., alpha,
  • Source:
• Notes

• % Occ.:Natural 0.01%
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 610.0 E9 years
  • Decay mode: alpha,
  • Source:
• Notes

• % Occ.:Natural 0.79%
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life:
  • Decay mode:
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.: 1/2
• Radioisotopes:
  • Half-life: 50.0 years
  • Decay mode: E.C.,
  • Source:
• Notes

• % Occ.:Natural 32.90%
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life:
  • Decay mode:
  • Source:
• Notes

• % Occ.:Natural 33.80%
• Mossbauer NRA: 15.8
• Nuclear spin/Quantum no.: 1/2
• Radioisotopes:
  • Half-life:
  • Decay mode:
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA: 20.7 *
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life:
  • Decay mode:
  • Source:
• Notes

• % Occ.:Natural 25.20%
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life:
  • Decay mode:
  • Source:
• Notes

• % Occ.:Natural 7.20%
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life:
  • Decay mode:
  • Source:
• Notes

• Isotope Cross-section 9±1 barns

• Absolute sensitivity: 3.36e-3 1H=1.0
• Relative sensitivity: 9.94e-3 1H=1.0
• Receptivity: 19.1 13C=1.0
• Magnetogyric ratio: 5.7412e7 rad / T / s
• Quadropole moment: m2
• Frequency: 21.499 MHz
• Reference: [Pt(CN)6]-2

Platinum Energy Properties

Electrons

• Ground state electron configuration: [Xe] 4f14 5d9 6s1
• Electron affinity: 247 kJ mol-1
• Filling orbitals:

Spectral lines

 Ionization energies

 Atomic energy levels