Indium
Physical Properties:
Symbol: In
Atomic Number: 49
Atomic Weight: 114.82 gm
Crystal Structure: Face-centered tetragonal
Density: 7.30 g/cm3 at 20 oC (68 oF)
7.026 g/cm3 at 164 oC
7.001 g/cm3 at 194 oC
6.974 g/cm3 at 228 oC
6.939 g/cm3 at 271 oC
6.916 g/cm3 at 300 oC
Thermal Properties
Melting Point: 156.61 oC
Boiling Point: 2080 oC
Latent Heat of Fusion: 28.47 kJ/kg
Latent Heat of Vaporization: 1959.42 kJ/kg
Thermal Conductivity: 83.7 W/m ⋅ K at 0 oC
Linear Coefficient of Thermal Expansion: 24.8 µm/m ⋅ K at 20 oC
Vapor Pressure: 1215 oC 0.1013 kPa
1421 oC 1.013 kPa
1693 oC 10.13 kPa
2080 oC 101.3 kPa
Electrical Properties:
Electrochemical Equivalent: Valence 3, 396.4µg/C
Electrode Potential: Ino ➞ In3+ + 3e, 0.38 V
Electrical Resistivity: oC nΩ ⋅ m
-269.77 (3.38 K) Super conducting:
20 84
154 291
181 301
222 319
280 348
Magnetic Properties:
Magnetic Susceptibility (Volumetric): 7.0 x 10-6 mks
Magnetism: Diamagnetic
Mechanical Properties:
Tensile Strength: 380 to 515 psi
Compressive Strength: 310 psi (True compressive stress at 10% true stain)
Poisson's Ratio (at 20 oC): Plane Value
(110) 1.337
(100) 0.673
(001) 0.486
Elongation (% in 1"): 22 to 41
Brindle Hardness: 0.9 tp 1.0
Reduction in Area (%): 85
Modulus of Elasticity: 1,570,000 psi
Speed of Sound (21.1 oC): 2504 m/sec
Solidification Shrinkage: 2.5%
Specific Heat (cal/g/oC) Solid at 20 oC: 0.065
Specific Volume (cc/g) at 20 oC: 0.136
Surface Tension (170 oC - 250 oC): 340 dyness/cm/oC
Surface Tension at MP: 513; 599 dyness/cm
Valence: 3 also 2 and 1
Nuclear Properties:
Stable Isotopes: 113, 115
Thermal Neutron Cross Section (2200 m/s) :
Absorption (barns): 190 ± 10
Scattering (barns): 2.2 ± 0.5