Pure and europium — like aluminum. In the air it instantly oxidizes (at room temperature), so long-term storage it is placed in a tightly closed container. This metal is one of the 14 elements of the lanthanide group with a melting point of 826 °C and a heat of vaporization — 176 kJ/mol. Like many other rare metals, it is often used as an alloying element, and its getting very expensive and requires complex chemical and physical effects. This is a very high-tech metal that is easily processed: it is rolled, bent, drilled, cut.
|Atomic number Eu||No. 63|
|Atomic mass g/mol||152|
|The degree of oxidation||2, 3|
|The melting temperature t°C||826°C|
|The boiling point of t°C||1597°C|
|Heat of evaporation kJ/mol||176|
Europium is the active element. Valence +2; +3. He displaces from solutions of salts of practically all metals and outdoors very quickly covered with an oxide film. To avoid oxidation, keep it in a jar with kerosene or under a layer of paraffin.
In the alloy with cubic Zirconia expands the width of the capture of thermal neutrons. In nuclear reactors the derivatives of europium included in the absorption rod. With Halogens this metal forms a light-sensitive crystals. Unstable isotope 154Eu can be used as a radioactive fuel. Eu2 O3 required in thermochemical splitting of deuterium and tritium. In laser optics this metal serves in the creation of powerful lasers generating radiation with a wavelength of 610 nm,
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