| Ordnungszahl: |
45 |
| Name: |
Rhodium |
| Namensursprung: |
Greek: rhodon (rose). Its salts give a rosy solution. |
| Entdeckung: |
1803 by William Wollaston in England |
| Beschreibung: |
Hard, silvery-white metal |
| Vorkommen: |
Obtained as a by-product of nickel production. |
| Verwendung: |
Used as a coating to prevent wear on high quality science equipment and with platinum to make thermocouples. |
| Gruppe: |
Transition Metal |
| Atomgewicht: |
102.90550 |
| Schmelzpunkt: |
1966°C +/-3°C |
| Siedepunkt: |
3695°C |
| Dichte bei 293 K: |
12.4 g/cm³ |
| Aggregatszustand bei Raumtemperatur: |
Solid |
| Schalen: |
2,8,18,16,1 |
| Orbitale: |
[Kr] 4d8 5s1 |
| Valenzen: |
2,3,4,5,6 |
| 1. Ionisierungs- potential: |
7.4589 V |
| 2. Ionisierungs- potential: |
18.08 V |
| 3. Ionisierungs- potential: |
31.06 V |
| Atomradius: |
1.83 Å |
| Spezifische Wärme: |
0.242 J/gK |
| Verdampfungswärme: |
493.0 kJ/mol |
| Schmelzwärme: |
21.50 kJ/mol |
| Thermischer Ausdehnungskoeffizient: |
8.2 10-6 K-1 |
| Röntgenemission Energie / Wellenlänge: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| eV |
20169.1 |
22724.6 |
2696.84 |
2834.51 |
0 |
0 |
|
|
|
| Å |
0.61472 |
0.5456 |
4.59743 |
4.37414 |
0 |
0 |
|
|
|
|
| Röntgenabsorption Energie / Wellenlänge: |
| |
K |
L-I |
L-II |
L-III |
M-I |
M-II |
M-III |
M-IV |
M-V |
| eV |
23220 |
3412 |
3147 |
3004 |
0 |
0 |
0 |
0 |
307 |
| Å |
0.53396 |
3.6338 |
3.9398 |
4.12734 |
0 |
0 |
0 |
0 |
40.3861 |
|
| Röntgen Fluoreszenz Ausbeute: |
| |
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
| |
80.6% |
0% |
5.2% |
0% |
0% |
0% |
|
|
|
|
| Nuklide: |
| |
Anteil |
Gewicht |
Spin |
Halbwertszeit |
Zerfallsmodus |
| Rh101 |
0% |
101 |
1/2 |
3.3y |
EC |
| Rh101m |
0% |
101 |
9/2 |
4.35d |
EC,IT |
| Rh102 |
0% |
102 |
6 |
~2.9y |
EC |
| Rh102m |
0% |
102 |
2 |
207d |
EC,β-,β+ |
| Rh103 |
100% |
102.906 |
1/2 |
|
Stable |
| Rh103m |
0% |
103 |
7/2 |
56.12m |
IT |
| Rh105 |
0% |
105 |
7/2 |
35.36h |
β- |
| Rh105m |
0% |
105 |
1/2 |
40s |
IT |
| Rh106 |
0% |
106 |
1 |
29.9s |
β- |
|
