Incommensurately Modulated Structure of K2SeO4
- 1 August 1984
- journal article
- research article
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 53 (8) , 2555-2564
- https://doi.org/10.1143/jpsj.53.2555
Abstract
The modulated structure in the incommensurate phase of K 2 SeO 4 has been analyzed at 113 K by X-ray diffractometry based on the concept of four-dimensional space. The final R -factor was 0.046 for all 905 reflections and 0.087 for 326 satellite reflections. The modulation is characterized by the rotation of SeO 4 groups around b -direction and the associated translation of K atoms along c -axis. The eigenvector of the modulation mode was determined from the observed atomic displacement pattern and it is compared with that of Σ 2 soft mode determined by neutron experiment. 1)Keywords
This publication has 7 references indexed in Scilit:
- Structure factor of modulated crystal structuresActa Crystallographica Section A, 1982
- Symmetry of incommensurate crystal phases. I. Commensurate basic structuresActa Crystallographica Section A, 1980
- Theoretical lattice-dynamical studies of the incommensurate phase transformation inSePhysical Review B, 1980
- Structural phase transformation inSePhysical Review B, 1977
- The Pseudo-Symmetry of Modulated Crystal StructuresActa Crystallographica Section A, 1974
- The crystal structure of K2SeO4Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1970
- Dielectric and Thermal Study of K2SeO4TransitionsJournal of the Physics Society Japan, 1970