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- Xu, Weiming M., et al.
(author)
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Pressure-induced hydrogen bond symmetrization in iron oxyhydroxide
- 2013
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In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 111:17
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Journal article (peer-reviewed)abstract
- Under high pressures the hydrogen bonds were predicted to transform from a highly asymmetric soft O-H center dot center dot center dot O to a symmetric rigid configuration in which the proton lies midway between the two oxygen atoms. Despite four decades of research on hydroxyl containing compounds, pressure induced hydrogen bond symmetrization remains elusive. Following single crystal x-ray diffraction, Mossbauer and Raman spectroscopy measurements supported by ab initio calculations, we report the H-bonds symmetrization in iron oxyhydroxide, FeOOH, resulting from the Fe3+ high-to-low spin crossover at above 45 GPa.
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