Synthesis and Characterization of Barium Tetrafluoridobromate(III) Ba(BrF4)2.

Autor:	Ivlev, Sergey, Sobolev, Vasily, Hoelzel, Markus, Karttunen, Antti J., Müller, Thomas, Gerin, Ivan, Ostvald, Roman, Kraus, Florian
Předmět:	BARIUM RIETVELD refinement RAMAN spectroscopy IR spectrometers ALKALINE earth metals
Zdroj:	European Journal of Inorganic Chemistry; Dec2014, Vol. 2014 Issue 36, p6261-6267, 7p
Abstrakt:	Alkali and alkaline earth metal tetrafluoridobromates MIBrF4, MII(BrF4)2 (MI = Na-Cs, MII = Sr, Ba) can be synthesized from the respective fluorides and BrF3. The reaction of BaF2 with liquid BrF3 under Freon-113 leads to the formation of Ba(BrF4)2 as a colorless microcrystalline powder. Here, we discuss its formation kinetics and thermodynamics. The compound crystallizes in the tetragonal space group I $\bar {4}$ with a = 9.65081(11) Å, c = 8.03453(13) Å, V = 748.32(2) Å3, and Z = 4 at 27 °C, and it is isotypic to Ba(AuF4)2. The structure contains square planar BrF4- anions. The compound is stable at ambient conditions excluding moisture and at temperatures up to approximately 200 °C. Solid-state computational calculations of the Raman and IR spectra are in good agreement with the experimentally obtained ones, and in combination with its powder X-ray diffraction pattern, density measurement, thermodynamics, elemental and EDXRF analyses, this shows that the compound is pure. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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