Table 1: Variation of various XRD parameters with composition “ 𝑥 ” for 𝑅 𝑏 0 . 5 𝑥 / 2 𝑍 𝑛 𝑥 𝑀 𝑛 0 . 0 5 𝐹 𝑒 2 . 4 5 𝑥 / 2 𝑂 4 .

Composition ( 𝑥 )Molecular weightDensity ( 𝑑 X R D ) g/cm3Density ( 𝑑 E x p ) g/cm3Porosity (%)Lattice parameter “ 𝑎

0 246.70 5.613 5.331 5.03 8.359
0.1 246.16 5.581 5.329 4.50 8.369
0.2 245.63 5.545 5.285 4.62 8.381
0.3 245.09 5.499 5.249 4.54 8.398
0.4 244.56 5.462 5.172 5.30 8.411
0.5 244.02 5.415 5.132 5.37 8.429