Rb2Sb4O11

Abstract

The title compound, dirubidium tetraantimonate(V), Rb2Sb4O11, has been synthesized by flux reaction. It is isotypic with knownA2Sb4O11(A= K, Cs) structures and consists of an (Sb4O11)2−skeleton and two Rb atoms as charge-compensating cations. Distorted SbO6octahedra share edges and corners, resulting in a layered assembly. Alternate stacking of the layers along thecaxis 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 ofmsymmetry (two Sb atoms, both Rb atoms and four O atoms) and 2 symmetry (one O atom).