Palladium Sulfide

	Palladium Sulfide Palladium sulfide may refer to: * Palladium(II) sulfide (PdS) * Palladium disulfide (PdS2) * Other binary compounds of palladium and sulfur Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula ..., including Pd4S, Pd2.8S, Pd2.2S References {{chemistry index ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Palladium(II) Sulfide Palladium(II) sulfide is a chemical compound of palladium and sulfur with the chemical formula PdS. Like other palladium and platinum chalcogenides, palladium(II) sulfide has complex structural, electrical and magnetic properties. Preparation Palladium(II) sulfide is formed when hydrogen sulfide is passed through an aqueous solution containing palladium in the +2 oxidation state: :Pd2+ + H2S → PdS + 2H+ Berzelius reacted palladium directly with sulfur to produce palladium(II) sulfide in 1813: :Pd + S → PdS Structure The crystal structure of PdS contains approximately square planar palladium centres and tetrahedral sulfur centres. Reactivity If palladium(II) sulfide is heated with an excess of sulfur, palladium disulfide is formed: :PdS + S → PdS2 Related compounds A variety of other compounds in the Pd-S system have been reported, including Pd4S, Pd2.8S, Pd2.2S and PdS2. The mineral Braggite has the composition (Pt, Pd, Ni)S and is isomorphous with PdS. See also * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Palladium Disulfide Palladium disulfide is a chemical compound of palladium and sulfur with the chemical formula PdS2. Preparation Palladium disulfide is formed when palladium(II) sulfide is heated with an excess of sulfur. :PdS + S → PdS2 However, some starting material may remain even after heating for many months. An alternative route involves heating palladium(II) chloride and excess sulfur to 450 °C in a sealed tube, then washing the crude product with carbon disulfide. This procedure yields PdS2 free of PdS. Structure PdS2 contains sulfur-sulfur bonds so it can be thought of as a disulfide that formally consists of S22− and Pd2+ ions, instead of S2- and Pd4+ ions. It adopts a layered crystal structure that contains square planar palladium centres and trigonal pyramidal sulfur centres. Related compounds A variety of other compounds in the Pd-S system have been reported, including Pd4S, Pd2.8S, Pd2.2S and PdS. See also * Pyrite * Marcasite The mineral marcasite, sometimes called “wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Binary Compound In materials chemistry, a binary phase or binary compound is a chemical compound containing two different elements. Some binary phase compounds are molecular, e.g. carbon tetrachloride (CCl4). More typically binary phase refers to extended solids. Famous examples zinc sulfide, which contains zinc and sulfur, and tungsten carbide, which contains tungsten and carbon. Phases with higher degrees of complexity feature more elements, e.g. three elements in ternary phases, four elements in quaternary phase In materials chemistry, a quaternary phase is a chemical compound containing four elements. Some compounds can be molecular or ionic, examples being chlorodifluoromethane () sodium bicarbonate (). More typically quaternary phase refers to exten ...s. References Chemical compounds {{chem-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Palladium Palladium is a chemical element with the symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by the English chemist William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). They have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. More than half the supply of palladium and its congener platinum is used in catalytic converters, which convert as much as 90% of the harmful gases in automobile exhaust (hydrocarbons, carbon monoxide, and nitrogen dioxide) into nontoxic substances (nitrogen, carbon dioxide and water vapor). Palladium is also used in electronics, dentistry, medicine, hydrogen purification, chemical applications, groundwate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]