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Redetermination of the crystal structure of caesium tetra-fluorido-bromate(III) from single-crystal X-ray diffraction
Artem V Malin1, Sergei I Ivlev2, Roman V Ostvald1
1National Research Tomsk Polytechnic University, 30 Lenina avenue, 634050 Tomsk, Russian Federation.
Abstract:
Caesium tetra-fluorido-bromate(III), CsBrF4, was crystallized in form of small blocks by melting and recrystallization. The crystal structure of CsBrF4 was redetermined from single-crystal X-ray diffraction data. In comparison with a previous study based on powder X-ray diffraction data [Ivlev et al. (2013 ▸). Z. Anorg. Allg. Chem. 639, 2846-2850], bond lengths and angles were determined with higher precision, and all atoms were refined with anisotropic displacement parameters. It was confirmed that the structure of CsBrF4 contains two square-planar [BrF4]- anions each with point group symmetry mmm, and a caesium cation (site symmetry mm2) that is coordinated by twelve fluorine atoms, forming an anti-cubocta-hedron. CsBrF4 is isotypic with CsAuF4.
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