Modulated structure of the composite crystal InCr1−xTixO3+x/2 |
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| Authors: | Yuichi Michiue Mitsuko Onoda Francisco Brown Noboru Kimizuka |
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| Institution: | Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan Departamento de Investigaciones en Polimeros y Materiales, Universidad de Sonora, Rosales s/n, Hermosillo, Sonora C.P.83000, Mexico Ceramic Materials Research Institute, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea |
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| Abstract: | Incommensurately modulated structure of the composite crystal InCr1−xTixO3+x/2 was refined by the profile fitting of powder X-ray diffraction based on the four-dimensional superspace group. The crystal consists of two monoclinic subsystems mutually incommensurate in b. The first subsystem is the alternate stacking of an edge-shared InO6 octahedral layer and a Cr/Ti triangle-lattice plane along c*. A sheet of oxygen atoms constructing the second subsystem is also extending on the Cr/Ti plane. The whole structure is the alternate stacking of an edge-shared InO6 octahedral layer and a Cr/Ti-O plane, where displacive modulation of O ions is prominent. Metal ions on the Cr/Ti-O plane are surrounded by three or four oxygen ions on the plane and, in addition, two axial ones. |
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| Keywords: | InCr1&minus xTixO3+x/2 Composite crystal Incommensurate structure Modulated structure |
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