Crystal structure of pseudobrookite-type Mg_5Nb_4O_<15> from 293 to 1117K
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概要
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Single crystals of a magnesium niobium oxide Mg5Nb4O15 were prepared at 1673 K. This compound has an orthorhombic pseudobrookite-type structure (space group Cmcm). The single-crystal structure refinement was carried out in the temperature range from 293 to 1173 K. The final R-factors were R = 0.025-0.038 and Rw = 0.031-0.044. The lattice parameters were a = 3.806(3), b = 10.057(3) and c = 10.260(4) Å at 293 K and a = 3.810(6), b = 10.188(5) and c = 10.398(5) Å at 1117 K. The linear thermal expansion coefficients were αa = 1.28 × 10-6, αb = 15.8 × 10-6 and αc = 16.3 × 10-6 K-1. Thermal expansion anisotropy in the bond distances and angles is consistent with the thermal expansion anisotropy in the lattice parameters.
- 公益社団法人 日本セラミックス協会の論文
- 2009-04-01
著者
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Kumada Nobuhiro
Department of Research Interdisciplinary Graduate School of Medicine and Engineering, University of
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Yonesaki Yoshinori
Department of Research Interdisciplinary Graduate School of Medicine and Engineering, University of
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TAKEI Takahiro
Department of Research Interdisciplinary Graduate School of Medicine and Engineering, University of
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KINOMURA Nobukazu
Department of Research Interdisciplinary Graduate School of Medicine and Engineering, University of
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Takei Takahiro
Dep. Of Res. Interdisciplinary Graduate School Of Medicine And Engineering Univ. Of Yamanashi
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Kumada N
Interdisciplinary Graduate School Of Medical And Engineering Univ. Of Yamanashi
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Kumada Nobuhiro
Department Of Research Interdisciplinary Graduate School Of Medicine And Engineering University Of Y
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Kinomura Nobukazu
Dep. Of Res. Interdisciplinary Graduate School Of Medicine And Engineering Univ. Of Yamanashi
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Yonesaki Yoshinori
Dep. Of Res. Interdisciplinary Graduate School Of Medicine And Engineering Univ. Of Yamanashi
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Takei Takahiro
Department Of Research Interdisciplinary Graduate School Of Medicine And Engineering
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Kinomura Nobukazu
Department Of Research Interdisciplinary Graduate School Of Medicine And Engineering
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Kumada Nobuhiro
Department of Research Interdisciplinary Graduate School of Medicine and Engineering
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YONESAKI Yoshinori
Department of Material Chemistry, Graduate School of Engineering, Kyoto University
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