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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. It is soft enough to be cut with a knife.
For example, europium(III) oxide can be used in picture tube televisions [67] and europium-doped yttrium oxysulfide (Y 2 O 2 S:Eu 3+) can be used as phosphors. [68] In addition, europium compounds can also be used in the manufacture of anti-counterfeiting materials.
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) oxide (Eu 2 O 3), 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 ...
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 ]
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 ...
Pages in category "Europium compounds" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. * Europium compounds; E.
Heating powdered europium and red phosphorus in an inert atmosphere or vacuum: [citation needed] 4 Eu + P 4 → 4 EuP. Passing phosphine through a solution of europium in liquid ammonia: [6] Eu + 2PH 3 → Eu(PH 2) 2 + H 2. Eu(PH 2) 2 is formed, which then decomposes to europium(III) phosphide and phosphine: [6] [7] 2Eu(PH 2) 2 → 2EuP + 2PH 3 ...