Rietveld Structure Refinement and Cation Distribution of Cr^𝟑+ Substituted Nanocrystalline Ni-Zn Ferrites

Table 1

Discrepancy factor (𝑅_wp), expected values (𝑅_exp), goodness fit factor (𝜒²), lattice constant (𝑎), and crystallite size (𝑡) of Ni_0.7Zn_0.3Fe_2−𝑥Cr_𝑥O₄.

Comp. 𝑥	𝑅wp (%)	𝑅exp (%)	𝜒^2	𝑎 (Å)	𝑡 (nm)
0.0	6.24	2.91	2.14	8.366	35
0.1	7.32	3.70	1.98	8.370	32
0.2	8.84	3.94	2.24	8.375	29
0.3	4.58	2.49	1.84	8.363	25
0.4	5.48	2.74	2.00	8.351	22
0.5	6.48	3.30	1.96	8.336	20