![]() Scanning electron microscopy reveals the formation of spherical-shaped particles with a flake-like grain structure, and their particle size distribution is similar to the crystalline size. The crystalline size, determined using Scherrer and Williamson–Hall techniques, decreases with increasing doping content. Rietveld-fitted X-ray diffraction studies reveal that the synthesized compounds exhibit rhombohedral symmetry (R3c space group), with lattice parameters and volume decreasing with increasing Mg substitution due to ionic mismatch of A-site cations. The compounds are synthesized using ultrasonication-assisted sol–gel synthesis techniques.
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