Indium

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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                            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