RETRACTED: Correlation between Optical Band Gap and Microstructural Defects in Nickel Chromite NanoparticlesManjula K, H.C. Manjunatha, Rajavaram Ramaraghavulu, R. Munirathnam and Vishwalinga Prasad BEPJ Web Conf., 359 (2026) 01009DOI: https://doi.org/10.1051/epjconf/202635901009