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The optical properties of diphosphate LiCrP2O7 compound prepared by the classic ceramic method were recorded at room temperature. Absorption spectrum shows the presence of five characteristics bands related to the octahedral transitions of Cr3+ from ground term 4A2g to excited terms. Crystal field strength and inter electronic repulsion Racah parameters were deduced. The calculated value of direct...
The sodium aluminum diphosphate compound has been synthesized by the classic ceramic method and characterized by X-ray diffraction technique, IR, 31P NMR, 23Na NMR and impedance spectroscopy. It crystallizes in monoclinic space group P21/c. The MAS-NMR spectra showed two and one isotropic resonances relatives to 31P and 23Na, respectively, revealing the existence of two phosphorus and one sodium...
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