Rare earth elements atomic weight and rare earth oxides formula weight
| Atomic
Symbol |
Atomic
Number |
Atomic
Weight |
Rare earth
Oxide |
F.Wt | Half F.Wt |
| La | 57 | 138.905 | La2O3 | 305.8 | 162.9 |
| Ce | 58 | 140.12 | CeO2 | 172.1 | 172.1 |
| Pr | 59 | 140.908 | Pr6O11 | 1021.4 | 170.2 |
| Nd | 60 | 144.2 | Nd2O3 | 336.4 | 168.2 |
| Sm | 62 | 150.4 | Sm2O3 | 348.8 | 174.4 |
| Eu | 63 | 151.96 | Eu2O3 | 351.9 | 176.0 |
| Gd | 64 | 157.2 | Gd2O3 | 362.4 | 181.2 |
| Tb | 65 | 158.925 | Tb4O7 | 747.7 | 186.9 |
| Dy | 66 | 162.5 | Dy2O3 | 373.0 | 186.5 |
| Ho | 67 | 164.93 | Ho2O3 | 377.9 | 188.9 |
| Er | 68 | 167.2 | Er2O3 | 382.4 | 191.2 |
| Tm | 69 | 168.93 | Tm2O3 | 385.87 | 192.93 |
| Yb | 70 | 173 | Yb2O3 | 394.0 | 197.0 |
| Lu | 71 | 174.96 | Lu2O3 | 397.9 | 199.0 |
| Sc | 21 | 44.9559 | Sc2O3 | 137.91 | 69.0 |
| Y | 39 | 88.92 | Y2O3 | 225.81 | 112.91 |
