Synthesis and Crystal Structure of (Cs3.5Rb0.5)[(Se0.85S0.15)O3]2[Te(OH)6]3

摘要

A mixed solution of (Cs_3.5Rb_0.5)[(Se_0.85S_0.15)O₃]₂[Te(OH)₆]₃ (CsRbSSeTe) was synthesized from an aqueous solution of H₆TeO₆, Rb₂SO₄, Rb₂CO₃, Cs₂CO₃, Cs₂SO₄ and H₂SeO₄. The rubidium caesium sulfite selenite tellurate salt crystallizes in the orthorombic system with the Pccn space group. It was analyzed at room temperature using XRD data. The unit cell parameters are a = 19.758(1), b = 9.464(1), c = 14.056(1)Å, Z = 8, V = 2628.22(2)Å3, giving D_x = 3.63 g/cm3. The refinement converged into R = 0.039, Rw = 0.040. The main feature of the atomic arrangements is the coexistence of three and different anions (SO₃2-, SeO₃2- and TeO₆6-) in the unit cell, connected by O-H…O hydrogen bonds, which allow construction of the crystal. The structures are formed by planes of octahedral Te(OH)₆. Between these planes, we find mixed planes occupied by trigonal SO₃2-/SeO₃2- anions and Cs+/Rb+ cations.