Инд. авторы:	Wehinger B., Bosak A., Nazzareni S., Antonangeli D., Mirone A., Chaplot S.L., Mittal R., Ohtani E., Shatskiy A., Saxena S., Ghose S., Krisch M.
Заглавие:	Dynamical and elastic properties of MgSiO3 perovskite (bridgmanite)
Библ. ссылка:	Wehinger B., Bosak A., Nazzareni S., Antonangeli D., Mirone A., Chaplot S.L., Mittal R., Ohtani E., Shatskiy A., Saxena S., Ghose S., Krisch M. Dynamical and elastic properties of MgSiO3 perovskite (bridgmanite) // Geophysical Research Letters. - 2016. - Vol.43. - Iss. 6. - P.2568-2575. - ISSN 0094-8276. - EISSN 1944-8007.
Внешние системы:	DOI: 10.1002/2016GL067970; РИНЦ: 27004141; SCOPUS: 2-s2.0-84963604314; WoS: 000374697200029;
Реферат:	eng: 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.
Ключевые слова:	1ST PRINCIPLES; HIGH-TEMPERATURE; SILICATE PEROVSKITE; HIGH-PRESSURE; SOUND-VELOCITY; SINGLE-CRYSTAL; LOWER MANTLE; CHEMISTRY; phonons; elasticity; bridgmanite; perovskite; MgSiO3; lattice dynamics; X-RAY-SCATTERING; AB-INITIO;
Издано:	2016
Физ. характеристика:	с.2568-2575