Rb2Sb4O11

The title compound, dirubidium tetraantimonate(V), Rb 2 Sb 4 O 11 , has been synthesized by flux reaction. It is isotypic with known A 2 Sb 4 O 11 ( A = K, Cs) structures and consists of an (Sb 4 O 11 ) 2− skeleton and two Rb atoms as charge-compensating cations. Distorted SbO 6 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).

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