Table 1 List of rare earth elements plus yttrium. Ionic radius is for trivalent ionic species unless indicated (From Rollinson (1993) modified)
From: Rare Earth Elements
Atomic number | Name | Symbol | Ionic radius for eightfold coordination (pm) |
|---|---|---|---|
57 | Lanthanum | La | 116.0 |
58 | Cerium | Ce | 114.3 (Ce3+) |
97.0 (Ce4+) | |||
59 | Praseodymium | Pr | 112.6 |
60 | Neodymium | Nd | 110.9 |
61 | Promethium | Pm | Not naturally occurring |
62 | Samarium | Sm | 107.9 |
63 | Europium | Eu | 106.6 (Eu3+) |
125.0 (Eu2+) | |||
64 | Gadolinium | Gd | 105.3 |
65 | Terbium | Tb | 104.0 |
66 | Dysprosium | Dy | 102.7 |
67 | Holmium | Ho | 101.5 |
68 | Erbium | Er | 100.4 |
69 | Thulium | Tm | 99.4 |
70 | Ytterbium | Yb | 98.5 |
71 | Lutetium | Lu | 97.7 |
39 | Yttrium | Y | 101.9 |