CuFeS2

CuFeS₂ (chalcopyrite) is a naturally occurring copper-iron sulfide mineral and the primary ore of copper, composed of copper, iron, and sulfur in a fixed stoichiometric ratio. It is industrially significant as the dominant source material for copper extraction via flotation and pyrometallurgical processing, and is increasingly studied as a semiconductor material for photovoltaic and thermoelectric applications due to its direct bandgap and earth-abundant composition. Engineers select CuFeS₂-based materials over synthetic alternatives when cost-effectiveness and large-scale availability are critical, or in emerging research contexts where high-performance semiconductors must be manufactured from abundant elements rather than scarce materials like cadmium or gallium.