Indium

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Indium

Indium (/ˈɪndiəm/ IN-dee-əm) is a chemical element with the symbol In and atomic number 49. It is a post-transition metal that makes up 0.21 parts per million of the Earth's crust.

Etymology

The name "Indium" originates from the Latin word "Indicus", meaning "of India". After its discovery in 1863, it was named for the indigo blue line in its spectrum that was the first indication of its existence in zinc ores.

Properties

Indium is a soft, silvery-white metal with a bright luster. It is very malleable, meaning it can be easily worked, and it is also ductile, which means it can be drawn into thin wires. It has a low melting point for metals and above its melting point, it ignites burning with a violet flame.

Uses

Indium is used in the production of low-melting alloys, typically with gallium. It is also used in the manufacture of semiconductors, solar cells, and in some types of LED lights.

Health Effects

Exposure to indium can have adverse health effects. Inhalation of indium compounds can cause indium lung, a rare interstitial lung disease.

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