Definition of pyrrhotite in English:



  • [mass noun] A reddish-bronze mineral consisting of iron sulphide, typically forming massive or granular deposits.

    • ‘Other sulfides, including pyrite, marcasite, chalcopyrite, and pyrrhotite, are occasionally found as well.’
    • ‘Microcrystals of pyrrhotite, goethite, pyrite, galena, and calcite are found on the dumps.’
    • ‘Secondary titanite, chlorite, white mica and pyrrhotite are abundant, and some samples contain metamorphic biotite.’
    • ‘We have not yet found any unaltered material to verify that the original mineral was pyrrhotite, as claimed by Brush.’
    • ‘We have also seen several specimens in which pyrite has replaced a hexagonal mineral that was probably pyrrhotite.’


Mid 19th century: from Greek purrhotēs redness + -ite.