Stabilization of pyrite (FeS2), marcasite (FeS2), arsenopyrite (FeAsS) and loellingite (FeAs2) surfaces by polymerization and auto-redox reactions

S. L. Harmer, H. W. Nesbitt

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42 Citations (Scopus)

Abstract

The polymerization and auto-redox reactions of the stabilization of pyrite, marcasite, arsenopyrite and loellingite surfaces was studied. Through the consideration of bulk structure and electronegativity of the elements constituting the dichalcogenides, the route to stabilization was predicted. Auto-redox and polymerization reactions stabilized uncompensated surfaces of the 3d transition metal-bearing dichalcogenides. It was observed that the bulk structure of the individual minerals coupled with the difference in the electronegativity of the Fe and ligand, determine the extent to which a surface auto-redox reaction or surface polymerization reaction stabilize the surface of Fe dichalcogenides.

Original languageEnglish
Pages (from-to)38-52
Number of pages15
JournalSurface Science
Volume564
Issue number1-3
DOIs
Publication statusPublished - 20 Aug 2004
Externally publishedYes

Keywords

  • Arsenic
  • Iron
  • Morphology
  • Roughness
  • Sulphides
  • Surface electronic phenomena (work function, surface potential, surface states, etc.)
  • Surface structure
  • Topography
  • X-ray photoelectron spectroscopy

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