Hg4As2CdI4

Hg₄As₂CdI₄ is a quaternary semiconductor compound combining mercury, arsenic, cadmium, and iodine—a member of the mixed-metal halide and chalcogenide family explored for infrared and radiation detection applications. This is primarily a research material rather than a commercialized product; compounds in this class are investigated for their potential as wide-bandgap or narrow-bandgap semiconductors sensitive to infrared radiation or ionizing radiation. The combination of heavy elements (Hg, Cd) with a halide/pnictide backbone makes it a candidate for specialized sensing and detection where conventional semiconductors (Si, GaAs) fall short, though synthesis complexity and toxicity concerns limit practical adoption compared to more established detector materials.