Ordnungszahl: |
66 |
Name: |
Dysprosium |
Namensursprung: |
Greek: dysprositos (hard to get at). |
Entdeckung: |
1886 by Paul Émile Lecoq de Boisbaudran in France |
Beschreibung: |
Soft, lustrous, silvery metal. |
Vorkommen: |
Usually found with erbium, holmium and other rare
earths in some minerals such as monazite sand, which is often 50% rare
earth by weight. |
Verwendung: |
Its uses are limited to the experimental and esoteric. |
Gruppe: |
Actinide Metal |
Atomgewicht: |
162.50 |
Schmelzpunkt: |
1412°C |
Siedepunkt: |
2567°C |
Dichte bei 293 K: |
8.536 g/cm³ |
Aggregatszustand bei Raumtemperatur: |
Solid |
Schalen: |
2,8,18,28,8,2 |
Orbitale: |
[Xe] 4f10 6s2 |
Valenzen: |
3 |
1. Ionisierungs- potential: |
5.9389 V |
2. Ionisierungs- potential: |
11.67 V |
3. Ionisierungs- potential: |
22.802 V |
Atomradius: |
2.49 Å |
Spezifische Wärme: |
0.17 J/gK |
Verdampfungswärme: |
230.0 kJ/mol |
Schmelzwärme: |
11.060 kJ/mol |
Thermischer Ausdehnungskoeffizient: |
9.6 10-6 K-1 |
Röntgenemission Energie / Wellenlänge: |
|
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
eV |
0 |
0 |
6495.43 |
7247.98 |
1292.86 |
1325.06 |
|
|
|
Å |
0 |
0 |
1.90881 |
1.71062 |
9.59001 |
9.35696 |
|
|
|
|
Röntgenabsorption Energie / Wellenlänge: |
|
K |
L-I |
L-II |
L-III |
M-I |
M-II |
M-III |
M-IV |
M-V |
eV |
53785 |
9046 |
8581 |
7790 |
2047 |
1842 |
1676 |
1333 |
1295 |
Å |
0.23052 |
1.37061 |
1.44488 |
1.5916 |
6.05693 |
6.73102 |
7.3977 |
9.30123 |
9.57416 |
|
Röntgen Fluoreszenz Ausbeute: |
|
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
|
94% |
0% |
22% |
0% |
0% |
0% |
|
|
|
|
Nuklide: |
|
Anteil |
Gewicht |
Spin |
Halbwertszeit |
Zerfallsmodus |
Dy154 |
0% |
153.924 |
0 |
3E06y |
α |
Dy156 |
0.052% |
155.924 |
0 |
|
Stable |
Dy157 |
0% |
157 |
3/2 |
8.1h |
EC |
Dy158 |
0.09% |
157.924 |
0 |
|
Stable |
Dy159 |
0% |
159 |
3/2 |
144.4d |
EC |
Dy160 |
2.29% |
159.925 |
0 |
|
Stable |
Dy161 |
18.88% |
160.927 |
5/2 |
|
Stable |
Dy162 |
25.53% |
161.927 |
0 |
|
Stable |
Dy163 |
24.97% |
162.929 |
5/2 |
|
Stable |
Dy164 |
28.18% |
163.929 |
0 |
|
Stable |
Dy165 |
0% |
165 |
7/2 |
2.33h |
β- |
Dy166 |
0% |
166 |
0 |
3.40d |
β- | |