K3 Na1 Fe1 Cl6

K₃Na₁Fe₁Cl₆ is a mixed-metal chloride compound containing potassium, sodium, and iron, classified as a semiconductor material. This is a research-phase compound rather than an established engineering material; it belongs to the family of halide perovskites and mixed-cation frameworks being investigated for optoelectronic and photovoltaic applications. The material's potential relevance stems from the deliberate combination of multiple cations to tune electronic properties, band gap, and stability—a strategy actively explored in next-generation solar cells, photodetectors, and light-emitting devices where conventional single-cation or binary halides show limitations.