Antimony has been in use by humans for years. Its mineral Stibnite was used by the Egyptians in cosmetics as black eyeliner. In the 1500s metallurgist Vannoccio Biringuccio wrote his paper “Concerning Antimony and Its Ore” focusing on Antinomy Sulfide. It was clear from this work that Antimony was isolated but metallurgists at the time did not appreciate their discoveries. Antimony despite being a metal has a low thermal conductivity and electrical conductivity and is brittle and crystalline. It is often used in the production of Lead alloys to make harder alloys. It is located in Group 15 as a metal. It has a melting point of 630°c and a boiling point of 1587°c.
Known to the ancients.
It is alloyed with other metals to increase their hardness. Also in the manufacture of a few special types of semiconductor devices. Also in plastics and chemicals. A few kinds of over-the-counter cold and flu remedies use antimony compounds.
Found in stibnite (Sb2S3) and in valentinite (Sb2O3).