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Three-dimensional Structure Analysis of $SmZn_{0.67}Sb_2$ by Transmission Electron Microscopy  

Kim, Jin-Gyu (Division of Nano-Material & Environment Science, Korea Basic Science Institute)
Kang, Sung-Kwon (Dept. of Chemistry, Chungnam National University)
Kim, Wan-Cheol (Dept. of Chemistry, Chungnam National University)
Kim, Youn-Joong (Division of Nano-Material & Environment Science, Korea Basic Science Institute)
Publication Information
Applied Microscopy / v.34, no.4, 2004 , pp. 255-264 More about this Journal
Abstract
The three-dimensional (3D) structure of an inorganic crystal, $SmZn_{0.67}Sb_2$ (space group P4/nmm, $a=4.26{\AA}\;and\;c=10.37{\AA}$) was solved by electron crystallography. High resolution electron microscopy (HREM) images from 3 different major zone axes and selected-area electron diffraction patterns from 16 different zone axes were combined to obtain a 3D information. A crystallographic image processing (CIP) of HREM images was used for more accurate determination of the crystal structure. As a result of this electron crystallography, average phase errors (${\Phi}_{res}$) of [001], [100] and [110] HREM images are $17.0^{\circ},\;8.3^{\circ}\;and\;21.9^{\circ}$, respectively. Xray crystallography of $SmZn_{0.67}Sb_2$ has attempted to compare accuracy of the structure determination by electron crystallography, which resulted in the cell parameters of $a=4.2976(6){\AA}\;and\;c=10.287(2){\AA}$, and the R-factor ($R_{sym}$) of 4.16%.
Keywords
Crystallographic image processing (CIP); Electron crystallography; HREM; Inorganic crystal; Three-dimensional (3D) structure analysis;
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