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Europium(II) Hydride
Europium hydride is the most common hydride of europium with a chemical formula EuH2. In this compound, europium atom is in the +2 oxidation state and the hydrogen atoms are -1. It is a ferromagnetic semiconductor. Production Europium hydride can be produced by directly reacting europium and hydrogen gas Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. At standard conditions hydrogen is a gas of diatomic molecules having the formula . It is colorless, odorless, tasteless, non-toxic, a ...: : Eu + H2 → EuH2 Uses EuH2 can be used as a source of Eu2+ to create metal-organic frameworks that have the Eu2+ ion. References {{Hydrides by group Europium(II) compounds Metal hydrides Ferromagnetic materials ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europium(II) Oxide
Europium(II) oxide (EuO) is a chemical compound which is one of the oxides of europium. In addition to europium(II) oxide, there is also europium(III) oxide and the mixed valence europium(II,III) oxide. Preparation Europium(II) oxide can be prepared by the Redox, reduction of europium(III) oxide with elemental europium at 800 °C and subsequent vacuum distillation at 1150 °C. :Eu2O3 + Eu → 3 EuO It is also possible to synthesize from the reaction of europium oxychloride and lithium hydride. :2 EuOCl + 2 LiH → 2 EuO + 2 LiCl + H2 In modern research, thin films can be manufactured by molecular beam epitaxy directly from europium atoms and oxygen molecules. These films have contamination of Eu3+ of less than 1%. Properties Europium(II) oxide is a violet compound as a bulk crystal and transparent blue in thin film form. It is unstable in humid atmosphere, slowly turning into the yellow europium(II) hydroxide hydrrate and then to white europium(III) hydroxide. EuO crys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europium(II) Hydroxide
Europium(II) hydroxide is an inorganic compound, with the chemical formula of Eu(OH)2. It can exist as the dihydrate Eu(OH)2·H2O. Preparation The monohydrate of europium(II) hydroxide can be obtained by the reaction of metal europium and 10 mol/L sodium hydroxide solution. There are some sources that use europium(III) chloride as a raw material, and prepare it by reacting the Jones reductor with sodium hydroxide solution. Properties Europium(II) hydroxide belongs to the orthorhombic crystal system, a=6.701 ± 0.002, b=6.197 ± 0.002, c=3.652 ± 0.001 A. It thermally decomposes to form europium(II) oxide (EuO); it is readily oxidized to europium(III) hydroxide Europium(III) hydroxide is an inorganic compound with a chemical formula Eu(OH)3. Chemical properties Europium(III) hydroxide can be prepared by reacting metallic europium with water. It reacts with acids In computer science, ACID ( atomicity, ... in air.无机化学丛书 第七卷 钪 稀土元素. 科学出版 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europium(II) Chloride
Europium(II) chloride is an inorganic compound with a chemical formula EuCl2. When it is irradiated by ultraviolet light, it has bright blue fluorescence. Preparation Europium dichloride can be produced by reducing europium trichloride with hydrogen gas at high temperature:Klemm, Wilhelm; Doll, Walter. Measurements on the bivalent and the quadrivalent compounds of the rare earths. VI. The halides of bivalent europium. ''Zeitschrift für Anorganische und Allgemeine Chemie'', 1939. 241: 233–238. . : 2 EuCl3 + H2 → 2 EuCl2 + 2 HCl If dry europium trichloride reacts with lithium borohydride in THF, it can also produce europium dichloride: : 2 EuCl3 + 2 LiBH4 → 2 EuCl2 + 2 LiCl + H2↑ + B2H6↑ Properties Europium dichloride can form yellow ammonia complexes:EuCl2•8NH3, and can dissolve to pale yellowish EuCl2•NH3. Europium dichloride can react with europium hydride Europium hydride is the most common hydride of europium with a chemical formula EuH2. In this compound, europ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samarium Hydride
Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidizes in air. Being a typical member of the lanthanide series, samarium usually has the oxidation state +3. Compounds of samarium(II) are also known, most notably the monoxide SmO, monochalcogenides SmS, SmSe and SmTe, as well as samarium(II) iodide. The last compound is a common reducing agent in chemical synthesis. Samarium has no significant biological role, and some samarium salts are slightly toxic. Samarium was discovered in 1879 by French chemist Paul-Émile Lecoq de Boisbaudran and named after the mineral samarskite from which it was isolated. The mineral itself was named after a Russian mine official, Colonel Vassili Samarsky-Bykhovets, who thus became the first person to have a chemical element named after him, albeit indirectly. Though classified as a rare-earth element, samarium is the 40th most abundant element in Earth's crust and more common than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
