Table 1 Lattice parameters, unit cell volumes, tolerance factors, goodness of fit and crystallite size of the compounds obtained from Rietveld refinement.
Doping content (x) | 0.00 | 0.02 | 0.04 | 0.06 |
|---|---|---|---|---|
Space group | I4/m | I4/m | I4/m | I4/m |
Symmetry | Tetragonal | Tetragonal | Tetragonal | Tetragonal |
a (Å) | 5.5601 | 5.5631 | 5.5660 | 5.5692 |
b (Å) | 5.5601 | 5.5631 | 5.5660 | 5.5692 |
c (Å) | 7.9190 | 7.9193 | 7.9230 | 7.9267 |
α = β = γ (°) | 90 | 90 | 90 | 90 |
Unit cell volume, V (Å3) | 244.889 | 245.090 | 245.517 | 245.863 |
Tolerance factor, τ | 0.9820 | 0.9817 | 0.9813 | 0.9810 |
χ2 | 1.931 | 2.737 | 2.459 | 3.396 |
Rp (%) | 7.67 | 9.83 | 8.96 | 9.90 |
Rwp (%) | 9.83 | 12.80 | 11.68 | 11.55 |
Crystallite size, D (nm) | 32.1230 | 27.254 | 28.224 | 28.974 |
