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.
|Journal||Acta Crystallographica Section E: Structure Reports Online|
|Publication status||Published - 2006 Apr 1|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics