K3GeS3

K3GeS3 is an inorganic ceramic compound belonging to the thiogermanate family, characterized by a framework structure combining potassium, germanium, and sulfur elements. This material is primarily investigated in research contexts for optical and photonic applications, particularly as a potential infrared-transparent ceramic and nonlinear optical material. Its sulfide-based composition positions it as an alternative to traditional oxide ceramics in specialized photonics, though it remains largely experimental and not yet commercialized at engineering scale.