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152 Eu (half-life 13.516 years) and 154 Eu (half-life 8.593 years) cannot be beta decay products because 152 Sm and 154 Sm are non-radioactive, but 154 Eu is the only long-lived "shielded" nuclide, other than 134 Cs, to have a fission yield of more than 2.5 parts per million fissions. [21]
Europium compounds fluoresce under UV light at 395 nm and 365 nm. [1] Europium compounds are compounds formed by the lanthanide metal europium (Eu). 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.
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 ]
Handbook of Chemistry and Physics (53rd ed.). Cleveland, Ohio: Chemical Rubber Co. ... Europium(III) chloride can be used as a starting point for the preparation of ...
Europium metal reacts directly with iodine to form europium(III) iodide: [5] 2 Eu + 3 I 2 → 2 EuI 3. Hydrated europium(III) iodide can be prepared dissolving europium(III) oxide or europium(III) carbonate in hydroiodic acid: [1] [6] Eu 2 O 3 + 6 HI + 6 H 2 O → 2 EuI 3 ·9H 2 O. Europium powder reacts with iodine in THF to form a THF adduct ...
Research at Laboratori Nazionali del Gran Sasso showed that europium-151 decays to promethium-147 with the half-life of 5 × 10 18 years; [29] later measurements gave the half-life as (4.62 ± 0.95(stat.) ± 0.68(syst.)) × 10 18 years. [30] It has been shown that europium is "responsible" for about 12 grams of promethium in the Earth's crust. [29]
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(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 ...