Luiza R. Araujo
Phase behaviour, thermal expansion and compressibility of SnMo 2 O 8
Araujo, Luiza R.; Gallington, Leighanne C.; Wilkinson, Angus P.; Evans, John S.O.
Authors
Abstract
The phase behaviour and thermoelastic properties of SnMo2O8, derived from variable temperature and pressure synchrotron powder diffraction data, are reported. SnMo2O8 is a member of the AM2O8 family of negative thermal expansion (NTE) materials, but unexpectedly, has positive thermal expansion. Over the P-T space explored (298–513 K, ambient to 310 MPa) four different forms of SnMo2O8 are observed: α, β, γ and γ′. The γ to β transition is temperature-, pressure-, and time-dependent. SnMo2O8 is a much softer material (α and γ form have BT = 29 and 26 GPa at 298 K) than other members of the AM2O8 family. Counter-intuitively, its high temperature β phase becomes stiffer with increasing temperature (BT ∼36 GPa at 490 K). The pressure dependence of the thermal expansion for each phase is reported.
Citation
Araujo, L. R., Gallington, L. C., Wilkinson, A. P., & Evans, J. S. (2018). Phase behaviour, thermal expansion and compressibility of SnMo 2 O 8. Journal of Solid State Chemistry, 258, 885-893. https://doi.org/10.1016/j.jssc.2017.08.040
Journal Article Type | Article |
---|---|
Acceptance Date | Aug 24, 2017 |
Online Publication Date | Sep 6, 2017 |
Publication Date | Feb 1, 2018 |
Deposit Date | Feb 1, 2018 |
Publicly Available Date | Sep 6, 2018 |
Journal | Journal of Solid State Chemistry |
Print ISSN | 0022-4596 |
Electronic ISSN | 1095-726X |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 258 |
Pages | 885-893 |
DOI | https://doi.org/10.1016/j.jssc.2017.08.040 |
Public URL | https://durham-repository.worktribe.com/output/1367410 |
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Copyright Statement
© 2017 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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