Abstract
The observation of a phase transformation from pyrite FeS 2 (Fe 2+ in a low-spin state) to szomolnokite FeSO 4·H 2O (Fe 2+ in a high-spin state) by the mechanical action of ball-milling in air is reported. 57Fe Mössbauer spectroscopy, X-ray diffraction and scanning electron microscopy were used to identify changes produced by mechanical activation. The pyrite structure can be sufficiently destabilized locally in the core of the powder particles, so that it may partly transform into szomolnokite during the milling process itself. After a long relaxation period in ambient air following sample grinding, the transformation process is shown to extend to the grain periphery without further mechanical activation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
