FeSe2

FeSe₂ (iron diselenide) is an intermetallic compound belonging to the pyrite-structure family of iron chalcogenides, characterized by its layered crystal structure and moderate elastic stiffness. This material is primarily of research interest as a potential semiconducting or thermoelectric compound, with applications being explored in energy conversion, photovoltaic devices, and catalytic systems rather than established industrial production. Engineers would consider FeSe₂ for specialized low-temperature electronic applications or as a precursor phase in composite materials, though it remains largely experimental compared to more mature alternatives like skutterudites or bismuth tellurides for thermoelectric use.