Sr4 I4 O2

Sr₄I₄O₂ is an experimental mixed-valent strontium iodide oxide compound belonging to the rare-earth-free semiconductor family, synthesized primarily through solid-state chemistry research rather than established industrial production. This material is investigated in the materials science literature for potential applications in optoelectronics and photocatalysis, where its unique crystal structure and electronic properties may offer advantages over conventional semiconductors, though it remains in early-stage development without widespread commercial deployment.