Aragonite-type lanthanum orthoborate, LaBO3

Akihiko Nakatsuka; Osamu Ohtaka; Hiroshi Arima; Noriaki Nakayama; Tadato Mizota

doi:10.1107/S1600536806010142

Aragonite-type lanthanum orthoborate, LaBO₃

Akihiko Nakatsuka, Osamu Ohtaka, Hiroshi Arima, Noriaki Nakayama, Tadato Mizota

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

7 Citations (Scopus)

Abstract

The crystal structure of the low-temperature (LT) modification of LaBO ₃ has been redetermined from single-crystal X-ray data; the resulting structure confirms the previous study [Abdullaev, Dzhafarov & Mamedov (1976). Azerbaidzhanskii Khim. Zh. pp. 117-120], but with improved precision. LT-LaBO₃ crystallizes in space group Pnma and adopts the aragonite-type structure. Except for one O atom, which is situated on a general position, all other atoms (one La, one B and a second O atom) lie on mirror planes. The structure is composed of LaO₉ polyhedra with an average La - O distance of 2.593 Å and trigonal BO₃ groups with an average B - O distance of 1.373 Å. Slight anisotropies of the thermal vibrations of La and B atoms suggest that the electrostatic La⋯La and L⋯B interactions across the shared edges are weak.

Original language	English
Pages (from-to)	i103-i105
Journal	Acta Crystallographica Section E: Structure Reports Online
Volume	62
Issue number	4
DOIs	https://doi.org/10.1107/S1600536806010142
Publication status	Published - 2006 Apr 1
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Aragonite-type lanthanum orthoborate, LaBO3",

abstract = "The crystal structure of the low-temperature (LT) modification of LaBO 3 has been redetermined from single-crystal X-ray data; the resulting structure confirms the previous study [Abdullaev, Dzhafarov & Mamedov (1976). Azerbaidzhanskii Khim. Zh. pp. 117-120], but with improved precision. LT-LaBO3 crystallizes in space group Pnma and adopts the aragonite-type structure. Except for one O atom, which is situated on a general position, all other atoms (one La, one B and a second O atom) lie on mirror planes. The structure is composed of LaO9 polyhedra with an average La - O distance of 2.593 {\AA} and trigonal BO3 groups with an average B - O distance of 1.373 {\AA}. Slight anisotropies of the thermal vibrations of La and B atoms suggest that the electrostatic La⋯La and L⋯B interactions across the shared edges are weak.",

author = "Akihiko Nakatsuka and Osamu Ohtaka and Hiroshi Arima and Noriaki Nakayama and Tadato Mizota",

year = "2006",

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T1 - Aragonite-type lanthanum orthoborate, LaBO3

AU - Nakatsuka, Akihiko

AU - Ohtaka, Osamu

AU - Arima, Hiroshi

AU - Nakayama, Noriaki

AU - Mizota, Tadato

PY - 2006/4/1

Y1 - 2006/4/1

N2 - The crystal structure of the low-temperature (LT) modification of LaBO 3 has been redetermined from single-crystal X-ray data; the resulting structure confirms the previous study [Abdullaev, Dzhafarov & Mamedov (1976). Azerbaidzhanskii Khim. Zh. pp. 117-120], but with improved precision. LT-LaBO3 crystallizes in space group Pnma and adopts the aragonite-type structure. Except for one O atom, which is situated on a general position, all other atoms (one La, one B and a second O atom) lie on mirror planes. The structure is composed of LaO9 polyhedra with an average La - O distance of 2.593 Å and trigonal BO3 groups with an average B - O distance of 1.373 Å. Slight anisotropies of the thermal vibrations of La and B atoms suggest that the electrostatic La⋯La and L⋯B interactions across the shared edges are weak.

AB - The crystal structure of the low-temperature (LT) modification of LaBO 3 has been redetermined from single-crystal X-ray data; the resulting structure confirms the previous study [Abdullaev, Dzhafarov & Mamedov (1976). Azerbaidzhanskii Khim. Zh. pp. 117-120], but with improved precision. LT-LaBO3 crystallizes in space group Pnma and adopts the aragonite-type structure. Except for one O atom, which is situated on a general position, all other atoms (one La, one B and a second O atom) lie on mirror planes. The structure is composed of LaO9 polyhedra with an average La - O distance of 2.593 Å and trigonal BO3 groups with an average B - O distance of 1.373 Å. Slight anisotropies of the thermal vibrations of La and B atoms suggest that the electrostatic La⋯La and L⋯B interactions across the shared edges are weak.

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Aragonite-type lanthanum orthoborate, LaBO₃

Abstract

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