Europium
63
Eu
Gruppe
n/a
Periode
6
Block
f
Protonen
Elektronen
Neutronen
63
63
89
Generelle Eigenschaften
Ordnungszahl
63
Atommasse
151,964
Massenzahl
152
Kategorie
Lanthanoide
Farbe
Silber
Radioaktiv
Nein
Europium wurde nach Europa benannt
Kristallstruktur
Kubisch raumzentriert
Geschichte
Europium was first found by Paul Émile Lecoq de Boisbaudran in 1890.
In 1896, French chemist Eugène-Antole Demarçay identified spectroscopic lines in ‘samarium' caused by europium.
He successfully isolated europium in 1901 using repeated crystallizations of samarium magnesium nitrate.
In 1896, French chemist Eugène-Antole Demarçay identified spectroscopic lines in ‘samarium' caused by europium.
He successfully isolated europium in 1901 using repeated crystallizations of samarium magnesium nitrate.
Elektronen pro Schale
2, 8, 18, 25, 8, 2
Elektronenkonfiguration
[Xe] 4f7 6s2
Europium is the most reactive rare earth element
Physikalische Eigenschaften
Aggregatzustand
Fest
Dichte
5,243 g/cm3
Schmelzpunkt
1099,15 K | 826 °C | 1518,8 °F
Siedepunkt
1802,15 K | 1529 °C | 2784,2 °F
Schmelzwärme
9,2 kJ/mol
Verdampfungswärme
175 kJ/mol
Spezifische Wärmekapazität
0,182 J/g·K
Häufigkeit in der Erdkruste
0,00018%
Häufigkeit im Universum
5×10-8%
CAS-Nummer
7440-53-1
PubChem CID-Nummer
23981
Atomeigenschaften
Atomradius
180 pm
Kovalenter Radius
198 pm
Elektronegativität
1,2 (Pauling-Skala)
Ionisierungsenergie
5,6704 eV
Molares Volumen
20,8 cm3/mol
Wärmeleitfähigkeit
0,139 W/cm·K
Oxidationszustände
2, 3
Anwendung
Europium is used in the manufacture of fluorescent glass.
It is also used in the anti-counterfeiting phosphors in Euro banknotes.
Europium-doped plastic has been used as a laser material.
Europium isotopes are good neutron absorbers and are used in nuclear reactor control rods.
It is also used in the anti-counterfeiting phosphors in Euro banknotes.
Europium-doped plastic has been used as a laser material.
Europium isotopes are good neutron absorbers and are used in nuclear reactor control rods.
Europium is considered to be mildly toxic
Isotope
Stabile Isotope
151Eu, 153EuInstabile Isotope
130Eu, 131Eu, 132Eu, 133Eu, 134Eu, 135Eu, 136Eu, 137Eu, 138Eu, 139Eu, 140Eu, 141Eu, 142Eu, 143Eu, 144Eu, 145Eu, 146Eu, 147Eu, 148Eu, 149Eu, 150Eu, 152Eu, 154Eu, 155Eu, 156Eu, 157Eu, 158Eu, 159Eu, 160Eu, 161Eu, 162Eu, 163Eu, 164Eu, 165Eu, 166Eu, 167Eu