Dynamical and elastic properties of MgSiO<sub>3</sub> perovskite (bridgmanite)

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

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Title		Dynamical and elastic properties of MgSiO₃ perovskite (bridgmanite)
Authors		Wehinger, Björn Bosak, Alexeï Nazzareni, Sabrina Antonangeli, Daniele Mirone, Alessandro Chaplot, Samrath Lal Mittal, Ranjan Ohtani, Eiji Shatskiy, Anton Saxena, Surendra Ghose, Subrata Krisch, Michael show all authors [1 - 12]
Published in		Geophysical Research Letters. 2016, vol. 43
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.
Keywords		Lattice dynamics — MgSiO3 — Perovskite — Bridgmanite — Elasticity — Phonons
Identifiers		DOI: 10.1002/2016GL067970
Full text		Article (Author postprint) (1 MB) - Free access
Structures		Faculté des sciences / Section de physique / Département de physique de la matière quantique
Research group		Groupe Ruegg
Citation (ISO format)		WEHINGER, Björn et al. Dynamical and elastic properties of MgSiO₃ perovskite (bridgmanite). In: Geophysical Research Letters, 2016, vol. 43. https://archive-ouverte.unige.ch/unige:82274