Abstract
Pyrrhotite (Fe7S8) is a natural iron sulphide that can participate in rock magnetisation. Its electronic structure is not yet surely described. X-ray magnetic circular dichroism (XMCD) at Fe L2,3 edges on Fe7S8, coupled with multiplet calculations, shows that iron is present only as Fe2+ in this magnetic iron sulphide. It reveals a strong magnetic orbital moment. XMCD at Fe and S K edges shows the quite strong polarization of both Fe and S in Fe7S8.
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Acknowledgments
We acknowledge the Laboratoire pour l’Utilisation du Rayonnement Electromagnetique (Orsay, France) and the European Synchrotron Radiation Facility (Grenoble, France) for provision of synchrotron radiation facilities and we would like to thank José Goulon, Nicolas Jaouen, Andrei Rogalev and Fabrice Wilhelm for assistance in using beamline ID12. We are grateful to Sandrine Brice-Profeta for her useful advice in the multiplet calculations. We thank Jean-Claude Boulliard for supplying the natural Fe7S8 sample.
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Letard, I., Sainctavit, P. & Deudon, C. XMCD at Fe L2,3 edges, Fe and S K edges on Fe7S8 . Phys Chem Minerals 34, 113–120 (2007). https://doi.org/10.1007/s00269-006-0132-8
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DOI: https://doi.org/10.1007/s00269-006-0132-8