Structural characterization of luminescent complex oxides:AxGa4+xTin-4-xO2n-2 (A=Na, Li; n=5, 6 and 7 and x≈0.7)
Alkali gallium titanates have attracted the interest due to their physycal properties, such as ionic donduction and photocatalysis. In this sense, we have synthesized a sodium/lithium gallium titanate homologous series with chemical formula: AxGa4+xTin-4-xO2n-2 (A=Na, Li n=5, 6 and 7 and x=0.7) powders (A total of 6 samples). We have carried on a preliminar characterization by XRD and several advanced electronic microscopy techniques. Moreover, this materials have shown very good and tunable luminiscent properties as we describe in the proposal letter. A characterization by neutron diffraction is necessarily required to accurately determine the positions and occupations of oxygen atoms, as well as, sodium and lithium composition present in the structure. The set of results obtained will allow us to know the accommodation of oxygen vacancies and its influence in the photoluminescence properties of these materials.
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HERNANDO GONZALEZ Maria; FERNANDEZ DIAZ Maria Teresa; GARCIA FERNANDEZ JAVIER; GONZALEZ CALBET Jose Maria and RAMIREZ-CASTELLANOS Julio. (2019). Structural characterization of luminescent complex oxides:AxGa4+xTin-4-xO2n-2 (A=Na, Li; n=5, 6 and 7 and x≈0.7). Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-23-733
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