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Synchrotron XPS evidence for Fe2+-S and Fe3+-S surface species on pyrite fracture-surfaces, and their 3D electronic states

Nesbitt, H. W ; Scaini, M ; Höchst, H ; Bancroft, G. M ; Schaufuss, A. G ; Szargan, R

The American mineralogist, 2000-05, Vol.85 (5-6), p.850-857 [Periódico revisado por pares]

Washington: Mineralogical Society of America

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Título:
Synchrotron XPS evidence for Fe2+-S and Fe3+-S surface species on pyrite fracture-surfaces, and their 3D electronic states
Autor: Nesbitt, H. W ; Scaini, M ; Höchst, H ; Bancroft, G. M ; Schaufuss, A. G ; Szargan, R
Assuntos: bonding ; chemical properties ; cracks ; crystal form ; crystal structure ; energy ; EPR spectra ; ferric iron ; ferrous iron ; fractures ; iron ; ligands ; metals ; microcracks ; Mineralogy ; Minerals ; nonsilicates ; optical properties ; pyrite ; spectra ; Spectrum analysis ; sulfides ; three-dimensional models ; X-ray data
É parte de: The American mineralogist, 2000-05, Vol.85 (5-6), p.850-857
Descrição: Knowledge of the reactivity of fracture surfaces is necessary for properly predicting the environmental and industrial consequences of their exposure to the atmosphere and natural solutions. This study examined the Fe surface states at pyrite fracture surfaces. The main peak of a X-ray photoelectron Fe 2p3/2 spectrum of a pristine pyrite fracture is ascribed to the bulk state, whereas the high binding energy tail of the spectrum is composed primarily of Fe2+ and Fe3+ surface state contributions. Fracture produces Fe2+ surface states with lower coordination than bulk sites. Fe2+ on bulk sites is octahedrally coordinated, whereas Fe2+ located at surfaces, edges and corners experiences modified Ligand Field Stabilization Energies that result in stabilization of the dz2 orbital and destabilization of the dxy orbital.
Editor: Washington: Mineralogical Society of America
Idioma: Inglês

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Synchrotron XPS evidence for Fe2+-S and Fe3+-S surface species on pyrite fracture-surfaces, and their 3D electronic states

Nesbitt, H. W ; Scaini, M ; Höchst, H ; Bancroft, G. M ; Schaufuss, A. G ; Szargan, R

Washington: Mineralogical Society of America

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