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Glass Physics and Chemistry

, Volume 33, Issue 4, pp 402–410 | Cite as

Disordered surface layers of metal sulfides and their reactivity

  • Yu. L. Mikhlin
Proceedings of the Topical Meeting of the European Ceramic Society “Structural Chemistry of Partially Ordered Systems, Nanoparticles, and Nanocomposites” (St. Petersburg, Russia, June 27–29, 2006)

Abstract

The surface of metal sulfides during reactions of oxidation and corrosion in aqueous solutions is investigated using X-ray photoelectron spectroscopy, X-ray spectroscopy, Mössbauer spectroscopy, scanning electron microscopy, and scanning probe microscopy. Primary attention is focused on the state of the surface layer of the sulfide phase. It is demonstrated that the composition of this layer is changed in such a way that there arises a metal deficiency (as a rule, rather substantial) and the structure becomes disordered. Experimental evidence that the surface layer can be considered a chalcogenide glassy semiconductors is discussed. The role of the localization of electronic states and specific defects in the reactivity of sulfides, particularly in oxidation and acid dissolution, is analyzed.

Keywords

Chalcopyrite Galena Arsenopyrite Glass Physic Bornite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  1. 1.Institute of Chemistry and Chemical Technology, Siberian DivisionRussian Academy of SciencesKrasnoyarskRussia

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