Antimony-121 Mössbauer studies of some fluoroantimonates(III)

Abstract

Antimony-121 Mössbauer spectra have been recorded at liquid-helium temperatures for a number of complex anions derived from SbF₃: M₂[SbF₅](M = Na, K, or N₂H₆); M[SbClF₃](M = K or NH₄); Na[SbClF₃]·H₂O; M[Sb₃F₁₀](M = Na, Tl, or NH₄) : M[Sb₄F₁₃](M = K or Cs); and [NH₄]₄[Sb₅F₁₉]. The data are consistent with the known stereochemistry of these compounds in which the antimony 5s electron pair is stereochemically active in a distorted AX₆E environment with the 3 :3 :l arrangement or monocapped octahedron, the lone pair being in the 1 position.