Abstract
In the oxidation of Pr 7O 12 to Pr 24O 44, the diminished number of defects within the crystal are structurally redistributed. Both structures have a direct relationship to the fluorite lattice for the arrangement of the metal and the oxygen atoms. The defect cluster in these structures consists of two vacancies within the oxygen sublattice that are paired along the [111] direction of the fluorite cell. The transition from one phase to the other is very often accompanied by twinning and also by the formation of antiphase boundaries. It is shown here that twin domains can be related to the loss of symmetry during transformation from the fluorite-related rhombohedral Pr 7O 12 to the triclinic Pr 24O 44. The family tree for the rare-earth oxygen-deficient fluorite-related structures is used to explain the twinning observed in Pr 24O 44.
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.
