en
Scientific article
English

Structural, elastic and vibrational properties of celestite, SrSO4, from synchrotron x-ray diffraction, thermal diffuse scattering and Raman scattering

Published inJournal of Physics. Condensed Matter, vol. 31, no. 5, 055703
Publication date2019
Abstract

In order to resolve inconsistencies encountered in published data for SrSO, the elasticity and the phase stability of celestite has been studied using thermal diffuse scattering, high pressure powder synchrotron x-ray diffraction, Raman scattering and DFT calculations. The structure of SrSO is found to be stable up to 62 GPa at ambient temperature. The preferred values for the components of the elastic stiffness tensor have been determined using x-ray thermal diffuse scattering and are (in GPa): c₁₁ = 105, c₂₂ = 92 , c₃₃ = 114, c₄₄ = 16, c₅₅ = 31, c₆₆ = 26, c₁₂ = 40, c₁₃ = 52, c₂₃ = 37. The preferred value for the bulk modulus is K = 62(2) GPa. This work shows that thermal diffuse scattering collected at two temperatures allows the determination of the full elastic tensor of crystals with low space group symmetry.

Keywords
  • Thermal diffuse scattering
  • Elasticity
  • Elastic tensor
  • X-ray diffraction
  • Raman scattering
  • High pressure
  • Celestite
Research group
Funding
  • Autre - BMBF
  • Autre - DFG
Citation (ISO format)
GIRARD, Adrien et al. Structural, elastic and vibrational properties of celestite, SrSO<sub>4</sub>, from synchrotron x-ray diffraction, thermal diffuse scattering and Raman scattering. In: Journal of Physics. Condensed Matter, 2019, vol. 31, n° 5, p. 055703. doi: 10.1088/1361-648X/aaf0ef
Main files (2)
Article (Submitted version)
Article (Published version)
accessLevelRestricted
Identifiers
ISSN of the journal0953-8984
499views
367downloads

Technical informations

Creation01/10/2019 9:32:00 AM
First validation01/10/2019 9:32:00 AM
Update time03/15/2023 3:22:16 PM
Status update03/15/2023 3:22:15 PM
Last indexation02/12/2024 12:58:38 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack