Cs5P5Se12

Cs5P5Se12 is a mixed-valent cesium phosphorus selenide compound belonging to the family of heavy-element chalcogenides, currently investigated as a research material for advanced semiconductor and photonic applications. This compound exists primarily in the scientific literature as an experimental phase, studied for its potential in infrared optics, nonlinear optical devices, and solid-state physics due to the combination of heavy anions (selenium) and alkali-metal cations (cesium) that can produce wide bandgaps and large optical nonlinearity. Engineers considering this material should recognize it as a materials-discovery candidate rather than an established engineering standard, relevant for exploratory projects in next-generation infrared sensing, frequency conversion, or specialized optical windows where conventional semiconductors prove inadequate.