Binary alloys 1 Dielectric losses 1 Double perovskites 1 Energy gap 1 Grainsize 1 Monoclinic symmetry 1 Optical and dielectric properties 1 Permittivity 1 Perovskite 1 Perovskite compounds 1 Rietveld refinement 1 Scanning electron microscopy 1 Solid state method 1 Space Groups 1 Synthesised 1 Tellurium compounds 1 UV-Vis diffuse reflectance spectroscopy X-ray diffraction data 1