Reply to the ‘Comment on “Investigation of the structural, surface topographical, fractal, capacitive, and electrical properties of a defect brownmillerite perovskite material KBiFeMnO5 for electronic devices” by P. Tomaszewski, RSC Adv., 2024, DOI: 10.1039/D4RA04218B’

This reply mainly deals with the scientific description of the comments on the structure of the published compound KBiFeMnO₅. The newly developed compound was prepared using a standard ceramic technology (high-temperature solid-state reaction technique). The high-purity ingredients (K₂CO₃, Bi₂O₃, Fe₂O₃ and Mn₂O₃) were taken stoichiometrically to create a single-phase compound, whereas, in the commented article, KBiFeMnO₅ is written as sillenite Bi₂₅FeO₄₀ or/and Bi₂₄Mn₂O₄₀ that is unacceptable without other detailed experiments.