| Dopant concentration | a, b (Ǻ) | c (Ǻ) | V (Ǻ)3 |
| X = 0 (0 mol%) | 5.57290 | 13.84420 | 372.35 |
| X = 0.03 (3 mol%) | 5.59360 | 13.58020 | 367.96 |
| X = 0.05 (5 mol%) | 5.60220 | 13.41726 | 364.67 |
| X = 0.1 (10 mol%) | 5.59308 | 13.56556 | 367.50 |