Neodym

60
Nd
Gruppe
n/a
Periode
6
Block
f
Protonen
Elektronen
Neutronen
60
60
84
Generelle Eigenschaften
Ordnungszahl
60
Atommasse
144,242
Massenzahl
144
Kategorie
Lanthanoide
Farbe
Silber
Radioaktiv
Nein
Aus dem Griechischen neos (neu) und didymos (Zwilling)
Kristallstruktur
Einfach hexagonal
Geschichte
Neodymium was first identified in 1885, in Vienna, by the Austrian chemist Carl Auer von Welsbach.

It was discovered in didymium, a substance incorrectly said by Carl Gustav Mosander to be a new element in 1841.

Pure neodymium metal was isolated in 1925.
Elektronen pro Schale
2, 8, 18, 22, 8, 2
Elektronenkonfiguration
[Xe] 4f4 6s2
Nd
Most of the world's neodymium is mined in China
Physikalische Eigenschaften
Aggregatzustand
Fest
Dichte
7,007 g/cm3
Schmelzpunkt
1297,15 K | 1024 °C | 1875,2 °F
Siedepunkt
3347,15 K | 3074 °C | 5565,2 °F
Schmelzwärme
7,1 kJ/mol
Verdampfungswärme
285 kJ/mol
Spezifische Wärmekapazität
0,19 J/g·K
Häufigkeit in der Erdkruste
0,0033%
Häufigkeit im Universum
1×10-6%
Ultrapure
Danksagungen für Bilder: Images-of-elements
Ultrapure neodymium under argon
CAS-Nummer
7440-00-8
PubChem CID Number
23934
Atomeigenschaften
Atomradius
181 pm
Kovalenter Radius
201 pm
Elektronegativität
1,14 (Pauling-Skala)
Ionisierungsenergie
5,525 eV
Molares Volumen
20,6 cm3/mol
Wärmeleitfähigkeit
0,165 W/cm·K
Oxidationszustände
2, 3
Anwendung
Neodymium is used to make specialized goggles for glass blowers.

Neodymium magnets appear in products such as microphones, professional loudspeakers, in-ear headphones, guitar and bass guitar pick-ups and computer hard disks.

Glass containing neodymium can be used as a laser material to produce coherent light.
Neodymium is considered to be moderately toxic
Isotope
Stabile Isotope
142Nd, 143Nd, 145Nd, 146Nd, 148Nd
Instabile Isotope
124Nd, 125Nd, 126Nd, 127Nd, 128Nd, 129Nd, 130Nd, 131Nd, 132Nd, 133Nd, 134Nd, 135Nd, 136Nd, 137Nd, 138Nd, 139Nd, 140Nd, 141Nd, 144Nd, 147Nd, 149Nd, 150Nd, 151Nd, 152Nd, 153Nd, 154Nd, 155Nd, 156Nd, 157Nd, 158Nd, 159Nd, 160Nd, 161Nd