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- Title
Pressure-induced normal-incommensurate and incommensurate-commensurate phase transitions in CrOCl.
- Authors
Bykov, Maxim; Bykova, Elena; Dubrovinsky, Leonid; Hanfland, Michael; Liermann, Hanns-Peter; van Smaalen, Sander
- Abstract
The high-pressure behavior of layered CrOCl is shown to be governed by non-bonded interactions between chlorine atoms in relation to a rigid framework composed of Cr and O atoms. The competition between optimizing intra- and interlayer Cl-Cl distances and the general trend towards denser packing defines a novel mechanism for high-pressure phase transitions of inorganic materials. CrOCl possesses an incommensurate phase for 16-51 GPa. Single-crystal x-ray diffraction in a diamond anvil cell provides an accurate description of the evolution of the incommensurate wave with pressure. It thus demonstrates a continuous increase of the amplitude up to 30 GPa, followed by a decrease of the wavelength until a lock-in transition occurs at 51 GPa.
- Subjects
COMMENSURATE-incommensurate transitions; CHLORINE; CHEMICAL bonds; PRESSURE-induced transformations; X-ray diffraction
- Publication
Scientific Reports, 2015, p9647
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep09647