Classifying Possible Tilting of Oxygen Octahedra in Perovskites
A. B. Harris
TL;DR
This paper reevaluates the possible structural phases of perovskites with tilted oxygen octahedra, emphasizing the importance of octahedral rigidity constraints in phase classification.
Contribution
It introduces a refined analysis that excludes symmetry-allowed structures incompatible with the rigid octahedra constraint.
Findings
Many symmetry-allowed structures are inconsistent with octahedral rigidity
Revised list of permissible tilting phases for perovskites
Enhanced understanding of perovskite phase stability
Abstract
The list of possible commensurate phases obtained from the parent tetragonal phase of perovskites by allowing the tilting of octahedra of oxygen ions is reexamined. It is found that many structures allowed by symmetry are not consistent with the constraint of very rigid octahedra.
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Taxonomy
TopicsPerovskite Materials and Applications · Solid-state spectroscopy and crystallography · Optical and Acousto-Optic Technologies