• Class: Metals
• Period: 5
• IUPAC group: 13
• Traditional: IIIb

• Discovered in: 1863 by Reich, Richter
• Origin of name: From the indigo line in its spectrum
• Historical or alternate name:

Zinc minerals as well as Iron, lead & Copper ores

Silvery white, soft metal. STABLE in air and water. Dissolves in acids.

• Atmosphere: ~0.0 ppm
• Primitive mantle: 0.018 ppm
• Sea water: 0.02 ppm
• Metallic meteorite: 0.0778 ppm
• Continental crust: 0.050 ppm
• Solar photosphere: 1.65 log of abundance
• Oceanic crust: 0.072 ppm
• Solar system: 0.184 relative to Si=1.0e6

   Hazards

Metal can ignite and burn. Compounds toxic by ingestion..

• Lower:
• Upper:

Indium Physical Properties

 Transitional Data

• State: Solid
• Density: 7.30 g/cm3

 Molar enthalpy

• Atomization: 243.72 kJ mol-1
• Fusion: 3.27 kJ mol-1
• Vaporization: 231.8 kJ mol-1

 Transition points

• Melting point: 429.76 K
• Boiling point: 2353.0 K
• Critical temperature: 6730.0 K

 Molar properties

• Atomic weight: 114.82 g/mole
• Molar volume: 15.851 cm3 mol-1

 Crystal structure sequence

face-centered-tetragonal

 Thermodynamics

• State: solid
  • Enthalpy 0
  • Gibbs function 0
  • Entropy 57.82
  • Heat Capacity 26.74

• State: gas
  • Enthalpy 243.30
  • Gibbs function 208.71
  • Entropy 173.79
  • Heat Capacity 20.84

 Miscellaneous physical

• Electrical resistivity: 8.37 µ-ohms/cm
• Debye temperature: 108.0 K
• Thermal conductivity: 81.6 W / m / K
• Coefficient of linear expansion: 32.5Coef. per K
• Mass magnetic susceptibility: -7.0e-9
• X-ray diffraction mass absorption coefficients:
• CuK: 243 (µ/p)/cm2 g-1
• MoK: 29.3 (µ/p)/cm2 g-1

Indium Chemical Properties

 Chemical basics:

• Oxidation states: +3
• Molecular wt: 114.82 g/mole

 Radii

• Covalent: 150 pm
• Atomic: 167.0 pm
• Van der Waals: pm

 Ions:

• ion: +3 pm 80.0

 Covalent bonds

 Effective nuclear charge

• Slater: 5.00
• Clementi: 8.47
• Froese-Fischer: 9.66

 Electronegativity

• Pauling: 1.7
• Allred-Rochow: 1.49

 Standard reactions

Indium Nuclear Properties

• Known 34
• Listed 5

• Known 106 - 124
• Listed 113 - 126

• % Occ.:Natural 4.3%
• Mossbauer NRA:
• Nuclear spin/Quantum no.: 9/2
• Radioisotopes:
  • Half-life:
  • Decay mode:
  • Source:
• Notes

• % Occ.:Natural 95.7%
• Mossbauer NRA:
• Nuclear spin/Quantum no.: 9/2
• Radioisotopes:
  • Half-life: 5.1 E14 years
  • Decay mode: Beta-
  • Source: reactor
• Notes

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

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

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

• Isotope Cross-section 194±2 barns

• Absolute sensitivity: 1.47e-2 1H=1.0
• Relative sensitivity: 0.34 1H=1.0
• Receptivity: 83.8 13C=1.0
• Magnetogyric ratio: 5.8493e7 rad / T / s
• Quadropole moment: 1.14e-28 m2
• Frequency: 21.866 MHz
• Reference: In(H2O)6+1

Indium Energy Properties

Electrons

• Ground state electron configuration: [Kr] 4d10 5s2 5p1
• Electron affinity: 34 kJ mol-1
• Filling orbitals:

Spectral lines

 Ionization energies

 Atomic energy levels