Lanthanoid
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Seltene Erdelemente mit den Ordnungszahlen 57–71. Sie zeichnen sich durch die Auffüllung der 4f-Elektronenorbitale aus. Obwohl sie als „Seltene Erden" bezeichnet werden, sind die meisten Lanthanoide in der Erdkruste relativ häufig anzutreffen.
57
Solid
La
Lanthanum
138,91 u
MP: —
BP: —
58
Solid
Ce
Cerium
140,12 u
MP: —
BP: —
59
Solid
Pr
Praseodymium
140,91 u
MP: —
BP: —
60
Solid
Nd
Neodymium
144,24 u
MP: —
BP: —
61
Solid
Pm
Promethium
145,0 u
MP: —
BP: —
62
Solid
Sm
Samarium
150,36 u
MP: —
BP: —
63
Solid
Eu
Europium
151,96 u
MP: —
BP: —
64
Solid
Gd
Gadolinium
157,25 u
MP: —
BP: —
65
Solid
Tb
Terbium
158,93 u
MP: —
BP: —
66
Solid
Dy
Dysprosium
162,5 u
MP: —
BP: —
67
Solid
Ho
Holmium
164,93 u
MP: —
BP: —
68
Solid
Er
Erbium
167,26 u
MP: —
BP: —
69
Solid
Tm
Thulium
168,93 u
MP: —
BP: —
70
Solid
Yb
Ytterbium
173,05 u
MP: —
BP: —
71
Solid
Lu
Lutetium
174,97 u
MP: —
BP: —
Vergleichstabelle
| # | Symbol | Name | Masse (u) | Schmelzpkt. | Siedepkt. | Dichte | Phase |
|---|---|---|---|---|---|---|---|
| 57 | La | Lanthanum | 138,91 | — | — | — | Solid |
| 58 | Ce | Cerium | 140,12 | — | — | — | Solid |
| 59 | Pr | Praseodymium | 140,91 | — | — | — | Solid |
| 60 | Nd | Neodymium | 144,24 | — | — | — | Solid |
| 61 | Pm | Promethium | 145,0 | — | — | — | Solid |
| 62 | Sm | Samarium | 150,36 | — | — | — | Solid |
| 63 | Eu | Europium | 151,96 | — | — | — | Solid |
| 64 | Gd | Gadolinium | 157,25 | — | — | — | Solid |
| 65 | Tb | Terbium | 158,93 | — | — | — | Solid |
| 66 | Dy | Dysprosium | 162,5 | — | — | — | Solid |
| 67 | Ho | Holmium | 164,93 | — | — | — | Solid |
| 68 | Er | Erbium | 167,26 | — | — | — | Solid |
| 69 | Tm | Thulium | 168,93 | — | — | — | Solid |
| 70 | Yb | Ytterbium | 173,05 | — | — | — | Solid |
| 71 | Lu | Lutetium | 174,97 | — | — | — | Solid |