TY - JOUR
T1 - Single-crystal X-ray diffraction study of SrGeO3 high-pressure perovskite phase at 100 K
AU - Nakatsuka, Akihiko
AU - Arima, Hiroshi
AU - Ohtaka, Osamu
AU - Fujiwara, Keiko
AU - Yoshiasa, Akira
N1 - Funding Information:
This work was partly supported by a Grant-in-Aid for Scientific Research (C) (No. 15K05344) from the Japan Society for the Promotion of Science. The characterization of crystallinity of synthesized crystals was performed under the research project (No. 2010G608) at Photon Factory BL-10A, High Energy Accelerator Research Organization, Tsukuba, Japan. We also thank Mr. R. Takagaki and Mr. M. Ogawa of Yamaguchi University for their experimental assistance.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2017/11/7
Y1 - 2017/11/7
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/950/4/042015
DO - 10.1088/1742-6596/950/4/042015
M3 - Conference article
AN - SCOPUS:85038588632
VL - 950
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 4
M1 - 042015
T2 - Joint AIRAPT-25th and EHPRG-53rd International Conference on High Pressure Science and Technology
Y2 - 30 August 2015 through 4 September 2015
ER -