PbTeGeO6: polar rosiaite-type germanate featuring a two dimensional layered structure†
Abstract
Polar rosiaite-type germanate PbTeGeO6 (PTGO) was grown from TeO2 flux. It exhibits a two dimensional layered structure composed of [TeGeO6]2− sheets with Pb2+ separation between the sheets. The second harmonic generation intensity of the title compound is about 1.5 times that of KH2PO4. The first principles calculation was performed to investigate its electronic structure, refractive indices and nonlinear optical properties.