Indium Properties

Indium

Physical

Melting Point

156.61 °C 74

Boiling Point

2,000.00 °C 50

Hardness

Mohs Hardness

1.20 20

Brinell Hardness

8.80 MPa 51

Vickers Hardness

Not Available 0

Optical Properties

Refractive Index

Not Available 0

Reflectivity

Not Available 0

Speed of Sound

1,215.00 m/s 51

Allotropes

No 0

α Allotropes

Not Available 0

β Allotropes

Not Available 0

γ Allotropes

Not Available 0

Chemical

Chemical Formula

In 0

Isotopes

Known Isotopes

35 4

Electronegativity

Pauling Electronegativity

1.78 16

Sanderson Electronegativity

2.14 8

Allred Rochow Electronegativity

1.49 13

Mulliken-Jaffe Electronegativity

1.76 10

Allen Electronegativity

1.66 18

Electropositivity

Pauling Electropositivity

2.22 38

Ionization Energies

1st Energy Level

558.30 kJ/mol 69

2nd Energy Level

1,820.70 kJ/mol 18

3rd Energy Level

2,704.00 kJ/mol 39

Electrochemical Equivalent

1.43 g/amp-hr 48

Electron Work Function

4.12 eV 24

Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity, Solubility 0

Mechanical

Density

Density At Room Temperature

7.31 g/cm³ 55

Density When Liquid (at m.p.)

7.02 g/cm3 33

Vapor Pressure

Vapor Pressure at 1000 K

0.01 (Pa) 11

Vapor Pressure at 2000 K

Not Available 0

Tensile Strength

2.50 MPa 21

Viscosity

Not Available 0

Elasticity properties

Shear Modulus

Not Available 0

Bulk Modulus

Not Available 0

Young's Modulus

11.00 GPa 51

Poisson Ratio

Not Available 0

Other Mechanical Properties

Ductile, Malleable 0

Periodic Table

Symbol

In 0

Group Number

13 5

Period Number

5 3

Block

p block 0

Element Family

Post-Transition 0

Atomic

Atomic Number

49 63

Atomic Weight

114.82 amu 57

Atomic Volume

15.70 cm3/mol 33

Electron Configuration

[Kr] 4d¹⁰ 5s² 5p¹ 0

Valence Electron Potential

54.00 (-eV) 25

Atom

Number of Protons

49 62

Number of Neutrons

66 45

Number of Electrons

49 62

Crystal Structure

Tetragonal (TETR) 0

Crystal Lattice

TETR-Crystal-Structure-of-Indium.jpg#100 0

Radius of an Atom

Atomic Radius

167.00 pm 24

Covalent Radius

142.00 pm 42

Van der Waals Radius

193.00 pm 31

Lattice Constant

325.23 pm 52

Lattice Angles

π/2, π/2, π/2 0

Lattice C/A Ratio

Not Available 0

Adjacent Atomic Numbers

Next Element

2 0

Previous Element

38 0

Magnetic

Electrical Properties

Resistivity

83.70 nΩ·m 34

Electrical Conductivity

0.12 10⁶/cm Ω 17

Electron Affinity

28.90 kJ/mol 31

Electrical Property

Conductor 0

Magnetic Characteristics

Specific Gravity

7.31 42

Magnetic Ordering

Diamagnetic 0

Permeability

Not Available 0

Susceptibility

Not Available 0

Thermal

Specific Heat

0.23 J/(kg K) 27

Thermal Conductivity

81.80 W/m·K 21

Critical Temperature

Not Available 0

Molar Heat Capacity

26.74 J/mol·K 25

Thermal Expansion

32.10 µm/(m·K) 9

Standard Molar Entropy

57.80 J/mol.K 22

Enthalpy

Enthalpy of Vaporization

226.40 kJ/mol 40

Enthalpy of Fusion

3.28 kJ/mol 55

Enthalpy of Atomization

242.70 kJ/mol 42

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