Mössbauer Studies of Chalcopyrite

Mössbauer spectra of naturally occurring mineral chalcopyrite have been studied over a temperature range 300°–448°K. The spectra showed a typical pattern of six absorption lines due to the internal magnetic field. The Q.S. have values which are independent of temperature whereas the magnitudes of the internal magnetic field are 325{±}10, 312{±}10 and 290{±}10 KOe at 300°,373° and 448°K respectively. These features are explained by assuming that Fe atom is in a spin free, trivalent state in weak crystal field configuration. The internal field is accounted to originate primarily through the Fermi contact interaction, H c ; both the H dip . and H orb . contributions being zero.