Acta Cryst. (2009). E65, i41  [ doi:10.1107/S1600536809016109 ]

Rb₂Sb₄O₁₁

G. Kalpana and M. T. Weller

Abstract: The title compound, dirubidium tetraantimonate(V), Rb₂Sb₄O₁₁, has been synthesized by flux reaction. It is isotypic with known A₂Sb₄O₁₁ (A = K, Cs) structures and consists of an (Sb₄O₁₁)^2- skeleton and two Rb atoms as charge-compensating cations. Distorted SbO₆ octahedra share edges and corners, resulting in a layered assembly. Alternate stacking of the layers along the c axis leads to the formation of tunnels. The Rb⁺ ions, surrounded by nine and ten O atoms, respectively, are located in these tunnels. Some atoms in the structure are on special positions of m symmetry (two Sb atoms, both Rb atoms and four O atoms) and 2 symmetry (one O atom).

Online 7 May 2009

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