Europium Metal Introduction

Atomic Number:	63	Atomic Radius:	233 pm (Van der Waals)
Atomic Symbol:	Eu	Melting Point:	822 °C
Atomic Weight:	152.0	Boiling Point:	1529 °C
Electron Configuration:	[Xe]6s24f7	Oxidation States:	3, 2

History

Named after Europe. In 1890 received Boisbaudran concentrates basic functions of samarium-gadolinium Sparks spectral lines which had not honored by the samarium gadolinium. These lines was later shown to include europium. The discovery of europium is generally Demarcay separating the rare earths in reasonably pure form in 1901, the pure metal was credited isolated until recent years.

The production

Europium is then prepared by mixing 10% -Excès Eu2O3with lanthanum metal and heating the mixture in atantalumcrucible under high vacuum. The element is collected as a white deposit silver metal on the walls of the crucible.

Property

As with other rare earth metals, in forlanthanum exception europium ignites in air at about 150 to 180 ° C europium is almost as heavy as lead and is quite ductile. It is the most reactive of the rare earth metals, rapidly oxidized in air. It resemblescalciumin its reaction with water. Bastnasite and monazite are the principal ores containing europium.

Swelling

Europium has been identified spectroscopically in the sun and certain stars. Seventeen isotopes are now recognized. Isotopes of europium good absorber of neutrons and be considered for use in nuclear control applications.