About the element

Indium is a chemical element with the symbol In and atomic number 49. Indium is the softest metal that is not an alkali metal. It is a silvery-white metal that resembles tin in appearance. It is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust.

Elements-In

Key facts

Most of the targeted by-products elements are Critical Raw Materials (CRMs). CRMs combine raw materials of high importance to the EU economy and of high risk associated with their supply.

  • Symbol: In
  • Melting point: 156.6 °C
  • Atomic number: 49
  • Atomic mass: 114.818 u

Indium has a low melting point for a metal: 313.9 degrees Fahrenheit (156.6 degrees Celsius).

More on Indium.