Technical data for Indium

Overview
NameIndium
SymbolIn
Atomic Number49
Atomic Weight114.818
Density7.31 g/cm3
Melting Point156.6 °C
Boiling Point2072 °C

Thermal properties
PhaseSolid
Melting Point156.6 °C
Boiling Point2072 °C
Absolute Melting Point429.75 K
Absolute Boiling Point2345 K
Heat of Fusion3.26 kJ/mol
Heat of Vaporization230 kJ/mol
Heat of CombustionN/A
Specific Heat233 J/(kg K)[note]
Thermal Conductivity82 W/(m K)
Thermal Expansion0.0000321 K-1

Bulk physical properties
Density7.31 g/cm3
Density (Liquid)7.02 g/cm3
Molar Volume0.000015707
Brinell Hardness8.83 MPa
Mohs Hardness1.2 MPa
Young Modulus11 GPa
Speed of Sound1215 m/s
Thermal Conductivity82 W/(m K)
Thermal Expansion0.0000321 K-1

Reactivity
Valence3
Electronegativity1.78
ElectronAffinity28.9 kJ/mol
Ionization Energies
558.3, 1820.7, 2704, 5210 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockp
Group13
Period5
Electron Configuration[Kr]4d105s25p1
ColorSilver
Discovery
1863 in Germany
Gas phaseN/A
CAS NumberCAS7440-74-6

Electrical properties
Electrical TypeConductor
Electrical Conductivity1.2×107 S/m
Resistivity8×10-8 m Ω
Superconducting Point3.41

Magnetic properties
Magnetic TypeDiamagnetic
Curie PointN/A
Mass Magnetic Susceptibility-1.4×10-9
Molar Magnetic Susceptibility-1.61×10-10
Volume Magnetic Susceptibility-0.0000102

Abundances
% in Universe3×10-8%
% in Sun4×10-7%
% in Meteorites4.4×10-6%
% in Earth's Crust0.000016%
% in Oceans1×10-11%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius156 pm
Covalent Radius144 pm
Van der Waals Radius193 pm
Crystal StructureCentered Tetragonal
Lattice Angles
π/2, π/2, π/2
Lattice Constants
325.23, 325.23, 494.61 pm
Space Group NameI4/mmm
Space Group Number139

Nuclear Properties
Half-LifeStable
LifetimeStable
Stable Isotopes
113In
Isotopic Abundances
113In4.29%
115In95.71%

Notes on the properties of Indium:
Specific Heat: Value given for solid phase.