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Naturally occurring europium is composed of two isotopes, 151 Eu and 153 Eu, which occur in almost equal proportions; 153 Eu is slightly more abundant (52.2% natural abundance). While 153 Eu is stable, 151 Eu was found to be unstable to alpha decay with a half-life of 5 +11
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(III) oxide (Eu 2 O 3) can be prepared by calcining europium(III) oxalate. [5] The dehydration of Eu 2 (C 2 O 4) 3 · 10H 2 O occurs below 200 °C: [1] Eu 2 (C 2 O 4) 3 ·10H 2 O → Eu 2 (C 2 O 4) 3 ·6H 2 O → Eu 2 (C 2 O 4) 3 ·4H 2 O → Eu 2 (C 2 O 4) 3. The decomposition of this compound takes place in two stages, the first at ...
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 ]
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 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(III) telluride is an inorganic compound, one of the tellurides of europium, with the chemical formula Eu 2 Te 3. In this compound, Eu is in the +3 oxidation state. [2] It can form cubic crystals. [3] It has limited solubility in lead telluride and forms a solid solution. [4]
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.