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Europium oxide (Eu 2 O 3) is widely used as a red phosphor in television sets and fluorescent lamps, and as an activator for yttrium-based phosphors. [51] [52] Color TV screens contain between 0.5 and 1 g of europium oxide. [53]
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]
In these compounds, europium generally exhibits the +3 oxidation state, such as EuCl 3, Eu(NO 3) 3 and Eu(CH 3 COO) 3. Compounds with europium in the +2 oxidation state are also known. The +2 ion of europium is the most stable divalent ion of lanthanide metals in aqueous solution. [2] Many europium compounds fluoresce under ultraviolet light ...
Rare-earth element abundances of basalts, of both terrestrial and lunar origins [1]. The europium anomaly is the phenomenon whereby the europium (Eu) concentration in a mineral is either enriched or depleted relative to some standard, commonly a chondrite or mid-ocean ridge basalt (MORB).
Europium(III) acetate is an inorganic salt of europium and acetic acid with the chemical formula of Eu(CH 3 COO) 3. In this compound, europium exhibits the +3 oxidation state . It can exist in the anhydrous form, sesqui hydrate [ a ] [ 1 ] and tetrahydrate. [ 2 ]
Europium hydride is the most common hydride of europium with a chemical formula EuH 2. In this compound, europium atom is in the +2 oxidation state and the hydrogen atoms are -1. [ 3 ] It is a ferromagnetic semiconductor .
Europium(II) iodide can be prepared in a handful of ways, including: Reduction of europium(III) iodide with hydrogen gas at 350 °C: [1] 2 EuI 3 + H 2 → 2 EuI 2 + 2 HI. Thermal decomposition of europium(III) iodide at 200 °C: [1] 2 EuI 3 → 2 EuI 2 + 2 I 2. Reaction of europium with mercury(II) iodide: [1] Eu + HgI 2 → Eu I 2 + Hg
Europium oxide is a compound from the two elements europium and oxygen. Europium oxide may refer to: Europium(II) oxide (europium monoxide, EuO) a magnetic semiconductor. Europium(III) oxide (europium sesquioxide, Eu 2 O 3), the most common oxide.