Ce4S4Cl2O

Ce₄S₄Cl₂O is a mixed-valence cerium oxychloride sulfide ceramic compound that combines rare-earth, halide, and chalcogenide chemistry. This is an experimental/research material rather than an established commercial ceramic; it belongs to the family of rare-earth oxychalcogenides being investigated for applications requiring unusual combinations of ionic and electronic properties. Interest in this compound class stems from potential use in solid-state ionics, luminescence, or catalysis, where the cerium redox activity and mixed-anion framework could offer advantages over conventional oxides or sulfides alone.