publication . Article . 2008

Linked Reactivity at Mineral-Water Interfaces Through Bulk Crystal Conduction

Yanina, Svetlana V.; Rosso, Kevin M.;
  • Published: 06 Mar 2008
  • Publisher: American Association for the Advancement of Science (AAAS)
Abstract
The semiconducting properties of a wide range of minerals are often ignored in the study of their interfacial geochemical behavior. We show that surface-specific charge density accumulation reactions combined with bulk charge carrier diffusivity create conditions under which interfacial electron transfer reactions at one surface couple with those at another via current flow through the crystal bulk. Specifically, we observed that a chemically induced surface potential gradient across hematite (alpha-Fe2O3) crystals is sufficiently high and the bulk electrical resistivity sufficiently low that dissolution of edge surfaces is linked to simultaneous growth of the c...
Subjects
free text keywords: Multidisciplinary, Electric charge, Chemistry, Mineralogy, Dissolution, Electrical resistivity and conductivity, Crystal, Hematite, visual_art.visual_art_medium, visual_art, Thermal conduction, Charge density, Chemical physics, Charge carrier
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publication . Article . 2008

Linked Reactivity at Mineral-Water Interfaces Through Bulk Crystal Conduction

Yanina, Svetlana V.; Rosso, Kevin M.;