Abstract
Structur al properties of anhydrous Nb 5+ -niobates and Ta 5+ -tantalates have been evaluated with the help of classic polyhedra approach and atomic net model. X-ray photoelectron spectroscopy (XPS) is utilized as a powerful method to determine the binding energy (BE) of individual atoms in the crystal lattice. Chemical bonding effects are discussed for niobates and tantalates using the binding energy differences ΔNb = (BE O 1s - BE Nb 3d5/2) and ΔTa = (BE O 1s - BE Ta 4f7/2) as key pa rameters to relate structural and electronic properties of the compounds with pronounced dielectric nature. Photocatalytic materials such as Sr2Nb2O7, Ta2O5, LiTaO3, and Sr2Ta2O7 are considered in particular.
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More From: International Journal of Applied Physics and Mathematics
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