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Updated: Jul 2, 2026

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
Published on: May 20, 2018
Dispersion Relation of an OH-Stretching Vibration from Inelastic X-Ray Scattering
Björn Winkler1, Alexandra Friedrich, Dan J Wilson
1Geowissenschaften, Goethe-Universität, Altenhoeferallee 1, D-60438 Frankfurt a.M., Germany. b.winkler@kristall.uni-frankfurt.de
Abstract:
We show that recent advances now allow us to measure the wave vector dependence of OH-stretching frequencies at energies around 400 meV by inelastic x-ray scattering using ID28@ESRF. We found a large, unexpected dispersion when we measured the dispersion relations of the hydrogen stretching frequencies of diaspore, alpha-AlOOH, where the hydrogen atoms participate in a hydrogen bond of intermediate strength. We can account for this behavior with density functional perturbation theory calculations and a simple model based on H-H interactions.
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