Selenium trioxide 5483173 215740934 2008-05-29T14:29:09Z DOI bot 6652755 Citation maintenance. Initiated by [[User:tarun2k|tarun2k]]. You can [[WP:DOI|use this bot]] yourself! Please [[User:DOI_bot/bugs|report any bugs]]. {{expert-subject|Chemistry|date=January 2007}} {{Chembox new | Name = Selenium trioxide | OtherNames = | Section1 = {{Chembox Identifiers | CASNo = 13768-86-0 }} | Section2 = {{Chembox Properties | Formula = SeO<sub>3</sub> | MolarMass = 126.96 g/mol | Appearance = white crystals<br /> [[hygroscopic]] | Density = 3.6 g/cm<sup>3</sup>, solid | Solubility = Very soluble, reacts | MeltingPt = 117.85 - 118.85°C | BoilingPt = 180°C (decomposes) }} | Section3 = {{Chembox Structure | CrystalStruct = tetragonal }} | Section7 = {{Chembox Hazards | EUClass = not listed }} }} '''Selenium trioxide''' ([[Selenium|Se]][[Oxygen|O<sub>3</sub>]]) is a [[chemical compound]] used in the manufacture of photoelectric cells and solar energy devices. A laboratory preparation is to react anhydrous K<sub>2</sub>SeO<sub>4</sub> and SO<sub>3</sub>. The compound is thermodynamically unstable with respect to [[selenium dioxide]]. The solid consists of cyclic tetramers, Se<sub>4</sub>O<sub>12</sub>. In the gas phase there is some dissociation into the monomer ==Bibliograpy== *{{Greenwood&Earnshaw}} *{{cite journal | last = Schmidt | first = Prof. Dr. Max | coauthors = Dr. P. Bornmann, Dr. Irmgard Wilhelm | date = 1963-10-2 | title = The Chemistry of Selenium Trioxide | journal = Angewandte Chemie International Edition in English | volume = 2 | issue = 11 | pages = 691–692 | doi = 10.1002/anie.196306913 }} ==References== {{Unreferenced|date =September 2007}} {{reflist}} [[Category:Oxides]] [[Category:Selenium compounds]] [[Category:Inorganic compound stubs]] {{inorganic-compound-stub}} [[ar:ثلاثي أكسيد سيلينيوم]] [[it:Triossido di selenio]] [[ja:三酸化セレン]]