Ca4 Fe4 O10

Ca₄Fe₄O₁₀ is a mixed-valence calcium-iron oxide ceramic compound that functions as a semiconductor, belonging to the family of iron-based oxides with potential applications in electrochemistry and materials research. This compound is primarily explored in research contexts for its electronic and ionic transport properties, with interest in energy storage systems, catalysis, and electrochemical devices where iron-oxygen redox chemistry is leveraged. As a mixed-metal oxide, it represents an alternative to single-metal oxide semiconductors, offering the possibility of tuned electronic properties through the combination of calcium and iron sites, though industrial applications remain limited compared to more established ceramic semiconductors.