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Europium is a chemical element; it has symbol Eu and atomic number 63. It is a silvery-white metal of the lanthanide series that reacts readily with air to form a dark oxide coating. Europium is the most chemically reactive, least dense, and softest of the lanthanides.
Europium(II) sulfate is the sulfate of divalent europium, which can be obtained by electrolysis of europium sulfate solution with mercury as the cathode, or by reducing europium(III) chloride with zinc amalgam, and then reacting with sulfuric acid. [50]
Europium(II) sulfide is the inorganic compound with the chemical formula EuS. It is a black, air-stable powder . Europium possesses an oxidation state of +II in europium sulfide, whereas the lanthanides exhibit a typical oxidation state of +III. [ 1 ]
Naturally occurring europium (63 Eu) is composed of two isotopes, 151 Eu and 153 Eu, with 153 Eu being the most abundant (52.2% natural abundance).While 153 Eu is observationally stable (theoretically can undergo alpha decay with half-life over 5.5×10 17 years), 151 Eu was found in 2007 to be unstable and undergo alpha decay. [4]
Europium(III) chloride is an inorganic compound with the formula EuCl 3. The anhydrous compound is a yellow solid. Being hygroscopic it rapidly absorbs water to form a white crystalline hexahydrate , EuCl 3 ·6H 2 O, which is colourless.
Europium(II) chloride is an inorganic compound with a chemical formula EuCl 2. When it is irradiated by ultraviolet light, it has bright blue fluorescence. When it is irradiated by ultraviolet light, it has bright blue fluorescence.
(Reuters) - Rare earth metals are making headlines as demand rises for products from smartphones to wind turbines, and as governments seek secure supply.
Europium(III) nitrate is an inorganic compound with the formula Eu(NO 3) 3 ·x(H 2 O). The hexahydrate is a common salt. The hexahydrate is a common salt. It forms colorless hygroscopic crystals.