| Ordnungszahl: |
39 |
| Name: |
Yttrium |
| Namensursprung: |
From the Swedish village, Ytterby, where one of its minerals was first found. |
| Entdeckung: |
1789 by Johann Gadolin in Finland |
| Beschreibung: |
Silvery, ductile, fairly reactive metal. |
| Vorkommen: |
Found in minerals such as monazite, xenotime, and yttria. |
| Verwendung: |
Combined with europium to make red phosphors for color TV's. Yttrium oxide and iron oxide combine to form a crystal garnet used in radar. |
| Gruppe: |
Transition Metal |
| Atomgewicht: |
88.90585 |
| Schmelzpunkt: |
1522°C +/-8°C |
| Siedepunkt: |
3338°C |
| Dichte bei 293 K: |
4.47 g/cm³ |
| Aggregatszustand bei Raumtemperatur: |
Solid |
| Schalen: |
2,8,18,9,2 |
| Orbitale: |
[Kr] 4d1 5s2 |
| Valenzen: |
3 |
| 1. Ionisierungs- potential: |
6.217 V |
| 2. Ionisierungs- potential: |
12.24 V |
| 3. Ionisierungs- potential: |
20.52 V |
| Atomradius: |
2.27 Å |
| Spezifische Wärme: |
0.30 J/gK |
| Verdampfungswärme: |
363.0 kJ/mol |
| Schmelzwärme: |
11.40 kJ/mol |
| Thermischer Ausdehnungskoeffizient: |
11.3 10-6 K-1 |
| Röntgenemission Energie / Wellenlänge: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| eV |
14933.7 |
16738.5 |
1922.61 |
1995.9 |
0 |
0 |
|
|
|
| Å |
0.83023 |
0.74072 |
6.44881 |
6.212 |
0 |
0 |
|
|
|
|
| Röntgenabsorption Energie / Wellenlänge: |
| |
K |
L-I |
L-II |
L-III |
M-I |
M-II |
M-III |
M-IV |
M-V |
| eV |
17038 |
2373 |
2156 |
2080 |
0 |
0 |
0 |
0 |
156 |
| Å |
0.72769 |
5.22484 |
5.75071 |
5.96084 |
0 |
0 |
0 |
0 |
79.4778 |
|
| Röntgen Fluoreszenz Ausbeute: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| |
71.1% |
0% |
2.7% |
0% |
0% |
0% |
|
|
|
|
| Nuklide: |
| |
Anteil |
Gewicht |
Spin |
Halbwertszeit |
Zerfallsmodus |
| Y86 |
0% |
86 |
4 |
14.74h |
EC,β+ |
| Y87 |
0% |
86.911 |
1/2 |
3.35d |
EC,β+ |
| Y88 |
0% |
87.91 |
4 |
106.6d |
EC,β+ |
| Y89 |
100% |
88.9058 |
1/2 |
|
Stable |
| Y89m |
0% |
89 |
0 |
15.7s |
IT |
| Y90 |
0% |
90 |
2 |
2.67d |
β- |
| Y90m |
0% |
90 |
7 |
3.19h |
IT |
| Y91 |
0% |
90.907 |
1/2 |
58.51d |
β- |
| Y91m |
0% |
91 |
9/2 |
49.71m |
IT |
| Y92 |
0% |
92 |
2 |
3.54h |
β- |
| Y93 |
0% |
93 |
1/2 |
10.2h |
β- |
|
