Synthese et structure du sulfate double MSbF 2SO 4 ( M = Rb, Cs)

The crystal structure of RbSbF ₂SO ₄ has been determined on a single crystal ( R = 0.078 for 710 reflections). The structure shows sulfate anions distorted by the SOSb bonds. The antimony atom is from an SbF ₂ unit. This antimony dihalogen is from the family of the {1}/{1} compounds which are in MX₃Sb X₃ ( M = Al, Ga, In) ( X = Cl, Br) systems.