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|Section2= |Section3= |Section7= |Section8= }} Tin selenide, also known as stannous selenide, is an inorganic compound with the formula (SnSe), where Tin has a +2 oxidation state. Tin(II) selenide is a narrow band-gap (IV-VI) semiconductor and has received considerable interest for applications including low-cost photovoltaics and memory-switching devices.〔(Tin(II) selenide ). sigmaaldrich.com〕 Tin(II) selenide is a typical layered metal chalcogenide; that is, it includes a Group 16 anion (Se2−) and an electropositive element (Sn2+), and it is arranged in a layered structure. Tin(II) selenide exhibits low thermal conductivity as well as reasonable electrical conductivity, creating the possibility of it being used in thermoelectric materials.〔Northwestern University. ("Surprising material could play huge role in saving energy: Tin selenide is best at converting waste heat to electricity." ) ScienceDaily, 17 April 2014.〕 In 2014, a team at Northwestern University has established the world record performance for thermoelectric material efficiency. == Structure == Tin(II) selenide (SnSe) has stiff bonds and distorted lattice, crystallizing in the orthorhombic GeSe (germanium selenide) structure. To be isomorphous, two substances must have the same chemical formulation, and they must contain atoms with corresponding chemical properties and with similar atomic radii. Tin(II) selenide exists in a doubled layered structure that derives from a distorted rock-salt structure. Within these double layers, each tin atom is covalently bonded to three neighboring selenide (Se) atoms, and each selenide atom is covalently bonded to three neighboring tin atoms. The double layers are then held together primarily by van der Waals forces. Tin(II) selenide’s layered structure bestows both anharmonic and anisotropic bonding to the compound. At pressures above 58 GPa, SnSe acts as a superconductor; this change of conductivity is likely due to a change in the structure to that of a CsCl structure. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tin selenide」の詳細全文を読む スポンサード リンク
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