Table 1. Average Crystallite Size of Nickel Oxide Nanoparticles Evaluated Using the Scherrer Equation

Miller Indices (hkl) Diffraction angle 2θ (degree) Full width at half maximum (degree) Average crystallite size (nm)
(111) 37.335 0.323 20.58
(200) 43.381 0.333
(220) 63.022 0.435
(311) 75.600 0.510
(222) 79.607 0.526