Kalpana Govindaraasan, Weller Mark T
School of Chemistry, University of Southampton, Highfield Campus, Southamtpon SO17 1BJ, England.
Acta Crystallogr Sect E Struct Rep Online. 2009 May 7;65(Pt 6):i41. doi: 10.1107/S1600536809016109.
The title compound, dirubidium tetra-anti-monate(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) octa-hedra 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).
标题化合物四锑酸二铷（V），Rb₂Sb₄O₁₁，通过助熔剂反应合成。它与已知的A₂Sb₄O₁₁（A = K，Cs）结构同型，由（Sb₄O₁₁）²⁻骨架和两个作为电荷补偿阳离子的Rb原子组成。畸变的SbO₆八面体共享边和角，形成层状组装体。这些层沿c轴交替堆叠导致形成隧道。分别被九个和十个O原子包围的Rb⁺离子位于这些隧道中。结构中的一些原子处于m对称（两个Sb原子、两个Rb原子和四个O原子）和2对称（一个O原子）的特殊位置。
