Europium

Images

Image

Attribution: images-of-elements.com

Animated Europium

History

Named after Europe. In 1890 Boisbaudran obtained basic fractions from samarium-gadolinium concentrates which had spark spectral lines not accounted for by samarium or gadolinium. These lines subsequently have been shown to belong to europium. The discovery of europium is generally credited to Demarcay, who separated the rare earth in reasonably pure form in 1901. The pure metal was not isolated until recent years.

Sources

Europium has been identified spectroscopically in the sun and certain stars. Seventeen isotopes are now recognized. Europium isotopes are good neutron absorbers and are being studied for use in nuclear control applications.

Uses

Europium-doped plastic has been used as a laser material. With the development of ion-exchange techniques and special processes, the cost of the metal has been greatly reduced in recent years.

General Info

AtomicNumber
63
Symbol
Eu
Name
Europium

Atomic Info

Appearance
AtomicWeight
151.964(1)
Color
61FFC7
ElectronicConfiguration
[Xe] 4f7 6s2
ElectronegativityInPauling
1.2
AtomicRadiusInPM
IonRadiusInPM
117 (+2)
VanDerWaalsRadiusInPM
IEinKJmol
547
EAinKJmol
-50
OxidationStates
2, 3
StandardState
solid
BondingType
metallic
MeltingPoint
1095
BoilingPoint
1800
Density
5.24
State
Lanthanide
DiscoveredYear
1901