Received 22 April 2009
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).
Data collection: COLLECT (Nonius, 1998); cell refinement: DENZO (Otwinowski & Minor, 1997) and COLLECT; data reduction: DENZO nd COLLECT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 2006); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: WM2230 ).
The authors thank the EPSRC for funding, the EPSRC National Crystallography Service for the use of the KappaCCD diffractometer and Dr Mark E. Light for useful discussions.
Brandenburg, K. (2006). DIAMOND. Crystal Impact GbR, Bonn, Germany.
Duhlev, R. (1994). Acta Cryst. C50, 1523-1525.
Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837-838.
Hirschle, C. J. R., Emmerling, F. & Röhr, C. (2001). Z. Naturforsch. Teil B, 56, 169-178.
Hong, H. Y.-P. (1974). Acta Cryst. B30, 945-952.
Nonius (1998). COLLECT. Nonius BV, Delft, The Netherlands.
Otwinowski, Z. & Minor, W. (1997). Methods in Enzymology, Vol. 276, Macromolecular Crystallography, Part A, edited by C. W. Carter Jr & R. M. Sweet, pp. 307-326. New York: Academic Press.
Sheldrick, G. M. (2007). SADABS. University of Göttingen, Germany.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.