Abstract
Lanthanide sesquioxides (Ln2O3) display three stable solid phases as a function of temperature. It has been assumed that Y2O3 should display similar crystal structures and phase transitions as other Ln2O3. Recently a new phase transition sequence was reported for Y2O3, contradicting earlier studies. In this work Y2O3 was found to have the same phase transition sequence as other lanthanide sesquioxides (Ln2O3). Additionally, in this study increasing external pressure has been found to have a similar effect to increasing temperature on crystal structure in Y2O3. At room temperature the first pressure-induced phase transition occured at ~13 GPa, in which the symmetry changed from cubic to monoclinic symmetry. The symmetry then changed from monoclinic to hexagonal at 24.5 GPa. The sequence of phase transitions was not reversible upon pressure release. With decreasing pressure only a single phase transition occurred, from hexagonal to monoclinic symmetry.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
