Related topics: Geology
py·ri·tes /paɪˈraɪtiːz $ pə-/ noun [uncountableU]
HEGa mix of sulphur with a type of metal, usually iron, or iron and copper 硫化矿 → fool’s goldpyrites• When the wetlands are drained the iron pyrites in the soil are exposed to air and form sulphur acid.• The scientists warn that the deposits of pyrites are too large to neutralize by liming.