Iridium

Iridium is a chemical element with the symbol Ir and atomic number 77. It is a dense, silvery-white metal that belongs to the platinum group of metals and is known for its high corrosion resistance and durability. Iridium is one of the rarest elements in the Earth's crust and is primarily obtained as a byproduct of mining platinum and nickel. It has a variety of applications, including in electronics, catalysts, and spark plugs, due to its excellent conductivity and resistance to heat and oxidation. Additionally, iridium is used in certain specialized alloys and in the production of high-quality dental materials. The name "iridium" is derived from the Latin word "iris," meaning rainbow, reflecting the diverse colors of its compounds.