Dysprosium

66
Dy
Gruppe
n/a
Periode
6
Block
f
Protonen
Elektronen
Neutronen
66
66
97
Generelle Eigenschaften
Ordnungszahl
66
Atommasse
162,5
Massenzahl
163
Kategorie
Lanthanoide
Farbe
Silber
Radioaktiv
Nein
From the Greek word dysprositos, meaning hard to get at
Kristallstruktur
Einfach hexagonal
Geschichte
French chemist Paul Émile Lecoq de Boisbaudran, while working with holmium oxide, separated dysprosium oxide from it in Paris in 1886.

His procedure for isolating the dysprosium involved dissolving dysprosium oxide in acid, then adding ammonia to precipitate the hydroxide.

It was not isolated in pure form until the development of ion exchange techniques in the 1950s.
Elektronen pro Schale
2, 8, 18, 28, 8, 2
Elektronenkonfiguration
[Xe] 4f10 6s2
Dy
Naturally occurring dysprosium is composed of 7 isotopes
Physikalische Eigenschaften
Aggregatzustand
Fest
Dichte
8,55 g/cm3
Schmelzpunkt
1680,15 K | 1407 °C | 2564,6 °F
Siedepunkt
2840,15 K | 2567 °C | 4652,6 °F
Schmelzwärme
11,1 kJ/mol
Verdampfungswärme
280 kJ/mol
Spezifische Wärmekapazität
0,17 J/g·K
Häufigkeit in der Erdkruste
0,00062%
Häufigkeit im Universum
2×10-7%
Ultrapure
Danksagungen für Bilder: Images-of-elements
Ultrapure dysprosium dendrites
CAS-Nummer
7429-91-6
PubChem CID Number
23912
Atomeigenschaften
Atomradius
178 pm
Kovalenter Radius
192 pm
Elektronegativität
1,22 (Pauling-Skala)
Ionisierungsenergie
5,9389 eV
Molares Volumen
19,0 cm3/mol
Wärmeleitfähigkeit
0,107 W/cm·K
Oxidationszustände
2, 3
Anwendung
Dysprosium oxide-nickel cermets are used in neutron-absorbing control rods in nuclear reactors.

Dysprosium is used in data storage applications such as compact discs and hard discs.

It is also used in dosimeters for measuring ionizing radiation.

Dysprosium iodide and dysprosium bromide are used in high intensity metal-halide lamps.
Dysprosium is considered to be moderately toxic
Isotope
Stabile Isotope
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164Dy
Instabile Isotope
138Dy, 139Dy, 140Dy, 141Dy, 142Dy, 143Dy, 144Dy, 145Dy, 146Dy, 147Dy, 148Dy, 149Dy, 150Dy, 151Dy, 152Dy, 153Dy, 154Dy, 155Dy, 157Dy, 159Dy, 165Dy, 166Dy, 167Dy, 168Dy, 169Dy, 170Dy, 171Dy, 172Dy, 173Dy