Abstract
We present density functional calculations of vibrational frequencies of OH groups on an idealized goethite (110) surface, represented by a large embedded cluster model. The calculations show that isolated surface groups bound to one, two, and three metal ions can have nearly identical OH stretching frequencies. This finding provides a strong constraint on interpretations of infrared spectra of oxide surfaces, and resolves a long-standing problem in OH vibrational assignments on goethite surfaces, where, in general, too few peaks have been observed relative to the expected heterogeneity of surface functional groups.
Received: 2009-5-28
Accepted: 2009-9-25
Published Online: 2015-4-2
Published in Print: 2010-2-1
© 2015 by Walter de Gruyter Berlin/Boston
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Keywords for this article
IR spectroscopy;
quantum mechanical calculations;
surface studies;
goethite;
iron oxide
Articles in the same Issue
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- Multilevel modular mesocrystalline organization in red coral
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- Chopinite-sarcopside solid solution, [(Mg,Fe)3□](PO4)2, in GRA95209, a transitional acapulcoite: Implications for phosphate genesis in meteorites
- Distribution of rare earth elements in lunar zircon
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- High-pressure phase transition of a natural pigeonite
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- Metasideronatrite: Crystal structure and its relation with sideronatrite
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- REE diffusion in olivine
- Phase transition induced by solid solution: The BCa-BMg substitution in richteritic amphiboles
- Aiolosite, Na2(Na2Bi)(SO4)3Cl, a new sulfate isotypic to apatite from La Fossa Crater, Vulcano, Aeolian Islands, Italy
- Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
- Galliskiite, Ca4Al2(PO4)2F8·5H2O, a new mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
- Description and crystal structure of liversidgeite, Zn6(PO4)4·7H2O, a new mineral from Broken Hill, New South Wales, Australia
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- Density functional calculation of the infrared spectrum of surface hydroxyl groups on goethite (α-FeOOH)
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