Anionic templating in a new layered bismuth tellurium oxychloride, Bi3Te4O10Cl5

Abstract

A new layered bismuth tellurium oxychloride, Bi₃Te₄O₁₀Cl₅ has been synthesized by a solid-state reaction under vacuum using Bi₂O₃, TeO₂, and TeCl₄ as reagents. The structure of Bi₃Te₄O₁₀Cl₅ has been determined by single-crystal X-ray diffraction. Bi₃Te₄O₁₀Cl₅ contains two different lone pair cations, Bi³⁺ and Te⁴⁺ that are in asymmetric coordination environments. Bi₃Te₄O₁₀Cl₅ has a novel two-dimensional layered structure consisting of distorted BiO₄Cl₂ octahedra, BiO₄Cl₃ polyhedra, TeO₄ polyhedra, and isolated Cl⁻ ions. Complete structural analysis, infrared spectrum, thermogravimetric analysis, and dipole moment calculations are presented. Crystal data: Bi₃Te₄O₁₀Cl₅, monoclinic, space group C2/m (No. 12), a = 15.372(3) Å, b = 4.1004(7) Å, c = 13.301(2) Å, β = 98.336(5)°, V = 829.5(2) ų, and Z = 2.