CRYSTAL STRUCTURE OF POTASSIUM β-TETRAFLUOROANTIMONATE(III) (β-KSbF4)
A. A. Udovenko, L. A. Zemnukhova, N. V. Makarenko
Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia
Keywords: синтез, кристаллическая структура, β-тетрафтороантимонат(III) калия, synthesis, crystal structure, potassium β-tetrafluoroantimonate(III)
Abstract
Сrystals of the previously unknown polymorph of potassium tetrafluoroantimonate(III) (β-KSbF4) are synthesized and their crystal structure is determined (orthorhombic crystal system: a = 8.1631(5) Å, b = 7.8563(5) Å, c = 6.5396(4) Å, V = 419.40(5) Å3, Z = 4, dcalc = 3.751 g/cm3, F(000) = 424, space group Pmn21). The main structural units of β-KSbF4 within the first coordination sphere are dimer complex [Sb2F8]2- anions formed of trigonal SbF4E and tetragonal SbF5E bipyramids with a common vertex. The previously described α-KSbF4 polymorph consists of tetrameric [Sb4F16]4- complexes formed of SbF5E bipyramids.
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