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Journal of Structural Chemistry

2017 year, number 4

CRYSTAL STRUCTURE AND 121,123Sb NQR PARAMETERS OF AMMONIUM TRIDECAFLUOROTETRAANTIMONATE(III) NH4Sb4F13

L. A. Zemnukhova1, A. A. Udovenko1, N. V. Makarenko1, S. I. Kuznetsov2, T. A. Babushkina2
1Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia
2Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia
Keywords: тридекафторотетраантимонат(III) аммония, синтез, кристаллическая структура, параметры ЯКР Sb, ammonium tridecafluorotetraantimonate(III), synthesis, crystal structure, Sb NQR parameters

Abstract

(NH4)Sb4F13 crystals (I) are synthesized and their crystal structure (tetragonal crystal system: a = 9.6431(2) Å, c = 6.5503(2) Å, V = 609.11(3) Å3, Z = 2, dcalc = 4.100 g/cm3, F (000) = 664, space group I ) is determined. The main structural units of I are tetranuclear anionic [Sb4F13]- complexes and [NH4]+ cations. The anionic complexes are built of four SbF3 groups linked together by tetrahedral bridging fluorine atom. At room temperature the (NH4)Sb4F13 crystals are isostructural to previously studied МSb4F13 (М = K, Rb, Cs, and Tl). The study of 121,123Sb NQR spectra of compound I is performed in a range of 77-370 K, which shows that when the temperature decreases (<250 K) the substance exhibits piezoelectric properties, as do other compounds of this group, but with a violation of their isostructurality.