|Atomic mass||114.818 amu|
|Number of Stable Isotopes||2|
|Density (grams per cc)||7.310 g/cm^3|
|Date of discovery||1863|
|Name of discoverer||Ferdinand Reich and Hieronymous Richter|
|Name origin||From the indigo blue it shows in a spectroscope.|
|Uses||Used as a coating for high speed bearings, in high-quality mirrors, solar cells, nuclear power regulators, photo cells, thermistors, transistors, and LCD displays. Also employed in low-melting alloys for safety devices.|
|Obtained from||Found in some zinc ores, but is primarily produced as a by-product of lead and zinc smelting.|
Indium is an element in the "poor metals" class (beyond the transition metals, before the nonmetals) of the periodic table. It is soft and silvery-white. It is stable in air and water, but dissolves in acids. It has two stable isotopes (actually one, but another one has a half-life of over 1014 years).
Indium was discovered spectroscopically (many 19th century element discoveries were made this way) while searching for thallium in zinc ores.
Indium oxide, mixed with a small amount of tin(II) oxide, has the remarkable and very useful property of being a transparent conductor of electricity. This makes it useful as the front electrode of liquid crystal displays (LCD).
|Periodic Table of the Elements|