In

Indium

Identification

CAS Number: 7440-74-6

Discovery Year: 1863

Discoverer: Ferdinand Reich, T. Richter

Discovery Location: Germany

Properties

Atomic Mass: 114.818 →Density: 7.31 g/cm³ →

Crust Abundance: 0.25 mg/kg

Crystal Structure: TET

Atomic Dimensions

Atomic Radius: 155 pm →

Atomic Radius (Rahm): 246 pm

Covalent Radius: 142 pm →

Van der Waals Radius: 193 pm

Metallic Radius: 142 pm

Atomic Volume: 15.7 cm³/mol

Lattice Constant: 4.59 Å

Thermodynamics

Melting Point: 429.32 K →Boiling Point: 2353 K →Specific Heat: 0.234 J/(g·K) →Thermal Conductivity: 81.8 W/(m·K) →Heat of Fusion: 3.24 kJ/mol →Heat of Vaporization: 225.1 kJ/mol →

Heat of Formation: 243 kJ/mol

Electronic Structure

Electron Config: [Kr] 4d10 5s2 5p

Block: p

Period: 5 →Group: 13 →Electronegativity: 1.78 →Electron Affinity: 0.3 eV →

Oxidation States: +3

Abundance & Geochemistry

Crust Abundance: 0.25 mg/kg

Sea Abundance: 0.02 mg/L

Goldschmidt Class: chalcophile

About

Soft silvery element belonging to group 13 of the periodic table. The most common natural isotope is In-115, which has a half-life of 6*10^4 years. Five other radioisotopes exist. Discovered in 1863 by Reich and Richter.

Isotopes

In-115 115 95.72%

In-113 113 4.28%