| Concentration of gadolinium (wt.%) | Average crystalline size (nm) | Cell volume (Å3) | Specific surface area (m2/g) × 103 |
| 0 | 64.5 | 47.79 | 16.435 |
| 0.2 | 52.1 | 47.71 | 20.346 |
| 0.4 | 51.2 | 47.67 | 20.704 |
| 0.6 | 47.1 | 47.52 | 22.506 |
| 0.8 | 56.0 | 47.83 | 18.929 |