Antimony is a generally blue-white chemical element with the symbol Sb. It has an atomic number of 51. As a metalloid, antimony has four allotropes. The stable form of antimony is a blue-white metalloid. Yellow and black antimony are unstable non-metals. Elemental antimony and its compounds are used in many areas, including electronics, flameproofing, paint, rubber, ceramics, enamels and a wide variety of alloys.
Antimony in its most common elemental form is a silvery white, brittle, fusible, crystalline solid that exhibits poor electrical and heat conductivity. It vaporizes at low temperatures. As a metalloid, antimony resembles both a metal and a non-metal in its appearance and in many of its physical properties. It does not chemically react as a metal. It reacts with oxidizing acids and halogens. Antimony and some of its alloys are unusual in that they expand on cooling. Antimony is geochemically categorized as a chalcophile, occurring with sulphur and the heavy metals lead, copper, and silver. Many antimony ores are sulphides, including stibnite (Sb2S3), pyrargyrite (Ag3SbS3), zinkenite, jamesonite, and boulangerite.757 Antimony pentasulfide is known, but is non-stoichiometric and contains only antimony in the +3 oxidation state. Several complex anions of antimony and sulphur are known, such as [Sb6S10]2− and [Sb8S13]2−.
The base value of each unit of ranges between 5 and 15Ð per unit, with up to 3 units being found at any one time.
Presence on Mars: Rare
|Group 1 | Group 2 | Group 3 | Group 4 | Group 5 | Group 6|
|Group 3|||Antimony | Astatine | Barium | Bismuth | Cesium | Francium | Hafnium | Indium | Iodine | Iridium | Lanthanum | Lead | Mercury | |Osmium | Platinum | Polonium | Radium | Radon | Rhenium | Tantalum | Tellurium | Thallium | Tin | Tungsten | Xenon||