On the crystal structures of La2Ti2O7 and La5Ti5O17: High-resolution electron microscopy

Tim Williams; Helmut Schmalle; Armin Reller; Frank Lichtenberg; Daniel Widmer; Georg Bednorz

doi:10.1016/0022-4596(91)90328-F

On the crystal structures of La₂Ti₂O₇ and La₅Ti₅O₁₇: High-resolution electron microscopy

Tim Williams, Helmut Schmalle, Armin Reller, Frank Lichtenberg, Daniel Widmer, Georg Bednorz

Research output: Contribution to journal › Article › Research › peer-review

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Abstract

The structure of La₅Ti₅O₁₇ has been examined by high-resolution transmission electron microscopy combined with powder X-ray and thermogravimetric analysis. It comprises five [TiO₆] octahedra-thick layers isomorphous with {1 0 0} slabs of the LaTiO₃ orthorhombic perovskite structure, bounded by crystallographic shear parallel with the perovskite [0 0 1] direction. La atoms occupy the distorted perovskitic A sites. The structure is derived from the homologous La₂Ti₂O₇ by elimination of 1 35 of the oxygens from this four-octahedra-thick layered structure. Both compounds are members of an homologous series based on variation in the anion to cation ratio.

Original language	English
Pages (from-to)	534-548
Number of pages	15
Journal	Journal of Solid State Chemistry
Volume	93
Issue number	2
DOIs	https://doi.org/10.1016/0022-4596(91)90328-F
Publication status	Published - 1 Jan 1991
Externally published	Yes

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10.1016/0022-4596(91)90328-F

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title = "On the crystal structures of La2Ti2O7 and La5Ti5O17: High-resolution electron microscopy",

abstract = "The structure of La5Ti5O17 has been examined by high-resolution transmission electron microscopy combined with powder X-ray and thermogravimetric analysis. It comprises five [TiO6] octahedra-thick layers isomorphous with {1 0 0} slabs of the LaTiO3 orthorhombic perovskite structure, bounded by crystallographic shear parallel with the perovskite [0 0 1] direction. La atoms occupy the distorted perovskitic A sites. The structure is derived from the homologous La2Ti2O7 by elimination of 1 35 of the oxygens from this four-octahedra-thick layered structure. Both compounds are members of an homologous series based on variation in the anion to cation ratio.",

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T1 - On the crystal structures of La2Ti2O7 and La5Ti5O17

T2 - High-resolution electron microscopy

AU - Williams, Tim

AU - Schmalle, Helmut

AU - Reller, Armin

AU - Lichtenberg, Frank

AU - Widmer, Daniel

AU - Bednorz, Georg

PY - 1991/1/1

Y1 - 1991/1/1

N2 - The structure of La5Ti5O17 has been examined by high-resolution transmission electron microscopy combined with powder X-ray and thermogravimetric analysis. It comprises five [TiO6] octahedra-thick layers isomorphous with {1 0 0} slabs of the LaTiO3 orthorhombic perovskite structure, bounded by crystallographic shear parallel with the perovskite [0 0 1] direction. La atoms occupy the distorted perovskitic A sites. The structure is derived from the homologous La2Ti2O7 by elimination of 1 35 of the oxygens from this four-octahedra-thick layered structure. Both compounds are members of an homologous series based on variation in the anion to cation ratio.

AB - The structure of La5Ti5O17 has been examined by high-resolution transmission electron microscopy combined with powder X-ray and thermogravimetric analysis. It comprises five [TiO6] octahedra-thick layers isomorphous with {1 0 0} slabs of the LaTiO3 orthorhombic perovskite structure, bounded by crystallographic shear parallel with the perovskite [0 0 1] direction. La atoms occupy the distorted perovskitic A sites. The structure is derived from the homologous La2Ti2O7 by elimination of 1 35 of the oxygens from this four-octahedra-thick layered structure. Both compounds are members of an homologous series based on variation in the anion to cation ratio.

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On the crystal structures of La2Ti2O7 and La5Ti5O17: High-resolution electron microscopy

Abstract

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On the crystal structures of La₂Ti₂O₇ and La₅Ti₅O₁₇: High-resolution electron microscopy