Indium’s current primary application is to form transparent electrodes from indium tin oxide (ITO) in liquid crystal displays and touchscreens and this use largely determines its global mining production. It is also used for making particularly low melting point alloys, and is a component in some lead-free solders. Indium tin oxide is used as a light filter in low-pressure sodium vapor lamps. The infrared radiation is reflected back into the lamp, which increases the temperature within the tube and therefore improves the performance of the lamp.
This metal was discovered by German chemists Hieronimus Theodor Richter and Fernidand Reich in 1863