Summary of the structural parameters of Ni0.6Zn0.4Al0.5Fe1.5−xNdxO4 (x = 0.0, 0.05, 0.075 and 0.1) nanoparticle samples.
| Parameter | x = 0.0 | x = 0.05 | x = 0.075 | x = 0.1 |
|---|---|---|---|---|
| Space group | Fd3̄m | Fd3̄m | Fd3̄m | Fd3̄m |
| a r (Å) | 8.347 | 8.351 | 8.350 | 8.354 |
| a exp (Å) | 8.325 | 8.331 | 8.335 | 8.339 |
| a th (Å) | 8.354 | 8.375 | 8.387 | 8.543 |
| V (Å3) | 577.1 | 582.4 | 582.3 | 583.1 |
| χ 2 | 1.29 | 1.8 | 1.75 | 3.7 |
| R p (%) | 24.9 | 23.1 | 18.6 | 35.5 |
| R wp (%) | 11.1 | 11.9 | 10.6 | 17.1 |
| R e (%) | 9.71 | 8.84 | 8.03 | 8.89 |
| ρ X-ray (g cm−3) | 5.124 | 5.176 | 5.227 | 5.277 |
| ρ th (g cm−3) | 3.334 | 3.314 | 3.234 | 3.321 |
| P (%) | 34.93 | 35.97 | 38.12 | 37.06 |
| S (m2 g−1) | 39.56 | 37.88 | 39.17 | 39.34 |
| D sc (nm) | 29.8 | 30.6 | 29.3 | 28.9 |
| D wh (nm) | 62 | 70 | 65 | 59 |
| ε × 10−3 | 1.96 | 2.9 | 3.1 | 1.9 |
| D sem (nm) | 37.62 | — | — | 35 |