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Europium(III) Acetate
Europium(III) acetate is an inorganic salt of europium and acetic acid with the chemical formula of Eu(CH3COO)3. In this compound, europium exhibits the +3 oxidation state. It can exist in the anhydrous form, sesquihydrate and tetrahydrate. Its hydrate molecule is a Dimer (chemistry), dimer. Preparation Europium acetate can be obtained by stirring reaction of acetic acid and Europium(III) oxide, europium oxide under heating, and then diluting with water and crystallizing: : Eu2O3 + 6 CH3COOH → 2 Eu(CH3COO)3 + 3 H2O Europium can also directly participate in the reaction: : 2 Eu + 6 CH3COOH → 2 Eu(CH3COO)3 + 3 H2↑ Properties Physical properties The anhydrous europium acetate crystallizes monoclinically in the space group ''C2/c'' (space group no. 15) with the lattice parameters ''a'' = 1126.0(3), ''b'' = 2900.5(6), ''c'' = 799.1( 2) pm and ''β'' = 132.03(2)° with four formula units per unit cell. The sesquihydrate crystallizes monoclinically in the space group Cc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europium(III) Oxide
Europium(III) oxide (Eu2O3), is a chemical compound of europium and oxygen. It is widely used as a red or blue phosphor in television sets and fluorescent lamps, and as an activator for yttrium-based phosphors. It is also an agent for the manufacture of fluorescent glass. Europium fluorescence is used in the anti-counterfeiting phosphors in Euro banknotes. Europium oxide has two common structures: Monoclinic ( mS30, space group ''C''2/''m'', No. 12) and cubic ( cI80, space group ''I''a, No. 206). The cubic structure is similar to that of manganese(III) oxide. It may be formed by ignition of europium Europium is a chemical element with the symbol Eu and atomic number 63. Europium is the most reactive lanthanide by far, having to be stored under an inert fluid to protect it from atmospheric oxygen or moisture. Europium is also the softest lanth ... metal. It can react with acids to form the corresponding europium(III) salts. Gallery File:Tl2O3structure.jpg, Cubic Eu2O3 File:Gd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
