Supercell ordering in a hollandite-type phase: Potassium magnesium antimony oxide

A. Pring; David J. Smith; D. A. Jefferson

doi:10.1016/0022-4596(83)90164-0

Supercell ordering in a hollandite-type phase: Potassium magnesium antimony oxide

A. Pring, David J. Smith, D. A. Jefferson

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

17 Scopus citations

Abstract

The hollandite-type phase K_1.33Mg_3.11Sb_4.89O₁₆ has been studied by X-ray and electron diffraction as well as high resolution electron microscopy at 500 kV. This material was found to adopt the tetragonal hollandite structure, space group I4 m, with a = 10.315 (4)Å; c = 3.080 (4) Å. The formation of a 3c body-centered supercell was observed and this was shown to be due to ordering of potassium cations within the tunnel sites. Computer image simulations established that ordering of the tunnel cations alone rather than the octahedrally coordinated framework cations was responsible for superlattice formation. In some crystals the supercell ordering appeared to occur in domains.

Original language	English (US)
Pages (from-to)	373-381
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	46
Issue number	3
DOIs	https://doi.org/10.1016/0022-4596(83)90164-0
State	Published - Mar 1 1983
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/0022-4596(83)90164-0

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title = "Supercell ordering in a hollandite-type phase: Potassium magnesium antimony oxide",

abstract = "The hollandite-type phase K1.33Mg3.11Sb4.89O16 has been studied by X-ray and electron diffraction as well as high resolution electron microscopy at 500 kV. This material was found to adopt the tetragonal hollandite structure, space group I4 m, with a = 10.315 (4){\AA}; c = 3.080 (4) {\AA}. The formation of a 3c body-centered supercell was observed and this was shown to be due to ordering of potassium cations within the tunnel sites. Computer image simulations established that ordering of the tunnel cations alone rather than the octahedrally coordinated framework cations was responsible for superlattice formation. In some crystals the supercell ordering appeared to occur in domains.",

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T1 - Supercell ordering in a hollandite-type phase

T2 - Potassium magnesium antimony oxide

AU - Pring, A.

AU - Smith, David J.

AU - Jefferson, D. A.

PY - 1983/3/1

Y1 - 1983/3/1

N2 - The hollandite-type phase K1.33Mg3.11Sb4.89O16 has been studied by X-ray and electron diffraction as well as high resolution electron microscopy at 500 kV. This material was found to adopt the tetragonal hollandite structure, space group I4 m, with a = 10.315 (4)Å; c = 3.080 (4) Å. The formation of a 3c body-centered supercell was observed and this was shown to be due to ordering of potassium cations within the tunnel sites. Computer image simulations established that ordering of the tunnel cations alone rather than the octahedrally coordinated framework cations was responsible for superlattice formation. In some crystals the supercell ordering appeared to occur in domains.

AB - The hollandite-type phase K1.33Mg3.11Sb4.89O16 has been studied by X-ray and electron diffraction as well as high resolution electron microscopy at 500 kV. This material was found to adopt the tetragonal hollandite structure, space group I4 m, with a = 10.315 (4)Å; c = 3.080 (4) Å. The formation of a 3c body-centered supercell was observed and this was shown to be due to ordering of potassium cations within the tunnel sites. Computer image simulations established that ordering of the tunnel cations alone rather than the octahedrally coordinated framework cations was responsible for superlattice formation. In some crystals the supercell ordering appeared to occur in domains.

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Supercell ordering in a hollandite-type phase: Potassium magnesium antimony oxide

Abstract

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