Dynamical and elastic properties of MgSiO3 perovskite (bridgmanite)

Björn Wehinger, Alexeï Bosak, Sabrina Nazzareni, Daniele Antonangeli, Alessandro Mirone, Samrath Lal Chaplot, Ranjan Mittal, Eiji Ohtani, Anton Shatskiy, Surendra Saxena, Subrata Ghose, Michael Krisch

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We report on the lattice dynamics of MgSiO3 perovskite (bridgmanite). Phonon spectroscopy was performed employing inelastic X-ray scattering from single crystals, and the results were confronted to ab initio calculations. We observe a remarkable agreement between experiment and theory, and provide accurate results for phonon dispersion relations, the vibrational density of states, and the full elasticity tensor. The present work constitutes an important milestone fully validating the lattice dynamics calculation against precise experimental evidence and marks a starting point to extend this kind of combined studies to the high-pressure and high-temperature conditions directly relevant for the physical properties and chemical composition of Earth's lower mantle.

Original languageEnglish
Pages (from-to)2568-2575
Number of pages8
JournalGeophysical Research Letters
Volume43
Issue number6
DOIs
Publication statusPublished - 28 Mar 2016

Keywords

  • bridgmanite
  • elasticity
  • lattice dynamics
  • MgSiO
  • perovskite
  • phonons

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