A new triphosphate TlFeHP3O10 was obtained by the hydrothermal method. It crystallizes in themonoclinic space group C2/c with a=11.994 (5), b= 8.476 (2), c=9.276 (3), β=111.99 (3), V=874.4 (5)and Z=4. The structure was determined by single-crystal X-ray diffraction data collection and providesa clear identification of hydrogen bonds interconnecting the triphosphoric groups in order to buildHP3O10 connected by FeO6 octhaedra sharing corners. Thallium cations are located in tunnels. Thisarrangement was confirmed by CHARDI and BVS models. IR spectrum confirms that most of thevibrational modes are comparable to similar triphosphates and to the calculated frequencies. BVSP andBVSE models were used to simulate conduction pathways migration in the tree dimensionalframework. The Bond valence analysis revealed that Tl+conductivity was one dimensional insured bycrystal sites with an activation energy 0.664 eV. However, H+conductivity was insured by both crystalsites and interstitials with 0.682 eV migration energy for one dimensional conductivity and 1.293 eVfor three dimensional migrations..
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