Single-crystal X-ray diffraction study of SrGeO3 perovskite (cubic; space group Pmm) synthesized at 6 GPa and 1223 K was conducted at a low temperature of 100 K. The residual electron density revealed the presence of the bonding electron at the center of the Ge-O bond, in accordance with our previous conclusion that the Ge-O bond is strongly covalent. From comparison with our previous structure-refinement result at 296 K, the mean square displacement (MSD) of the O atom in the direction of the Ge-O bond is suggested to exhibit no significant temperature dependence, in contrast to that in the direction perpendicular to the bond. Thus, the strong covalency of the Ge-O bond can have a large influence on the temperature dependence of thermal vibration of the O atom.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2017 Nov 7|
|Event||Joint AIRAPT-25th and EHPRG-53rd International Conference on High Pressure Science and Technology - Madrid, Spain|
Duration: 2015 Aug 30 → 2015 Sep 4
ASJC Scopus subject areas
- Physics and Astronomy(all)