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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.
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(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 ...
While Eu is an incompatible element in its trivalent form (Eu 3+) in an oxidizing magma, it is preferentially incorporated into plagioclase in its divalent form (Eu 2+) in a reducing magma, where it substitutes for calcium (Ca 2+). [3] Ce and Eu anomalies characteristic of serpentinite found in ultra-slow spreading ridges and transform faults. [4]
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.
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(II) sulfate is the inorganic compound with the formula EuSO 4. Two polymorphs are known, α and the more stable β. Both are colorless. The β polymorph is isostructural with barium sulfate, hence it is insoluble in water. The salt is generated by addition of soluble europium(II) salts to dilute sulfuric acid. [1]