A new three-dimensional incommensurately modulated cubic phase (in ZrP2B7) and its symmetry characterization via temperature- dependent electron diffraction

Withers, R.L.; Tabira, Y.; Evans, J.S.O.; King, I.J.; Sleight, A.W.

Abstract

A detailed electron diffraction study has been made of the ZrP2O7 member of the AM(2)O(7) family of framework structures and of its temperature-dependent structural phase transformations. The room-temperature phase corresponds to a primitive 3 x 3 x 3 superstructure phase of probable space group symmetry Pa3. An observed glide extinction condition when viewed down < 001 > ages could, however, also be compatible with resultant Pbca space group symmetry. The high-temperature phase corresponds to the normal unmodulated parent structure. An intervening intermediate phase that exists over a relatively narrow temperature window (similar to 5-10 degreesC) around 294 degreesC is shown to be a three-dimensional incommensurately modulated cubic phase characterized by incommensurate primary modulation wave vectors in the close vicinity of 0.31 < 100 >* and probable superspace group symmetry P: Pa (3) over bar: Ia (3) over bar. (C) 2001 Academic Press.

Citation

Withers, R., Tabira, Y., Evans, J., King, I., & Sleight, A. (2001). A new three-dimensional incommensurately modulated cubic phase (in ZrP2B7) and its symmetry characterization via temperature- dependent electron diffraction. Journal of Solid State Chemistry, 157(1), 186-192

• Journal Article Type: Article
• Publication Date: 2001-02
• Journal: Journal of Solid State Chemistry
• Print ISSN: 0022-4596
• Electronic ISSN: 1095-726X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 157
• Issue: 1
• Pages: 186-192
• Public URL: https://durham-repository.worktribe.com/output/1556779
• Publisher URL: <Go to ISI>://000167634500025