| seltene Erden |
| Ordnungszahl |
Kürzel |
Element |
Atomgewicht |
Schmelzpunkt |
Siedepunkt |
Dichte |
Bemerkungen |
| 57 |
La |
Lanthan |
138,91 |
920 |
3470 |
6,17 |
|
| 58 |
Ce |
Zer |
140,12 |
795 |
3470 |
6,77 |
|
| 59 |
Pr |
Praseodym |
140,9 |
935 |
3130 |
6,78 |
|
| 60 |
Nd |
Neodym |
144,24 |
1024 |
3030 |
7,00 |
|
| 61 |
Pm |
Promethium |
145 |
Radioaktiv |
|
| 62 |
Sm |
Samarium |
150,35 |
1072 |
1900 |
7,54 |
|
| 63 |
Eu |
Europium |
151,96 |
826 |
1440 |
5,26 |
|
| 64 |
Gd |
Gadolinium |
157,25 |
1312 |
3000 |
7,9 |
MRT-Kontrastmittel |
| 65 |
Tb |
Terbium |
158,924 |
1356 |
2800 |
8,27 |
|
| 66 |
Dy |
Dysprosium |
162,50 |
1407 |
2600 |
8,54 |
Permanentmagneten |
| 67 |
Ho |
Holmium |
164,930 |
1461 |
2600 |
8,80 |
|
| 68 |
Er |
Erbium |
167,26 |
1497 |
2900 |
9,0 |
|
| 69 |
Tm |
Thulium |
168,934 |
1545 |
1730 |
9,33 |
|
| 70 |
Yb |
Ytterbium |
173,04 |
824 |
1430 |
6,98 |
|
| 71 |
Lu |
Lutetium |
174,97 |
1652 |
3330 |
9,84 |
|
| 72 |
Hf |
Hafnium |
178,49 |
1700 |
|
13,3 |
|
|