Silica-free barium titanate bulk glasses, containing lanthanide elements, show unusually high dielectric response and a high refractive index. These properties allow crucial optical elements to be developped, e.g. enable the storage capacity of BluRay disk up to 150GB. To reveal the origin of these properties, the glass structure at atomic level should be understood. Our recent study suggests that corner- and edge-sharing TiO5 polyhedra act as network former in the glass. However, the role of lanthanide is still unclear. We propose to measure novel glasses in the La2O3-BaO-TiO2 system which are practically important and also represent unique model materials for studying the structure of SiO2-free titanate glasses. The ND results will be combined with HE-XRD and EXAFS data to ensure a reliable structural modelling and greatly advance our understanding of unusual disordered materials.