Dehydration and decomposition behavior of the NaH2(PO4)0,48AsO4)0,52.H2O compound in the temperature range from 253 K to 333 K.

Authors

  • Khaled Jarraya Laboratoire Physico-Chimie de L’état Solide, LR11ES51, Faculté des Sciences de Sfax BP 1171,3000 Sfax
  • Taher Mhiri Laboratoire Physico-Chimie de L’état Solide, LR11ES51, Faculté des Sciences de Sfax BP 1171,3000 Sfax
  • Xavier Le Goff Laboratoire Diffusion – Diffraction, UMR 5257 Institut de Chimie Séparative de Marcoule BP 17171, 30207 Bagnols

DOI:

https://doi.org/10.24297/jac.v10i3.6655

Keywords:

Phase transition, Raman Spectroscopy, XRD powder, Ion conductivity, Dehydration-Decomposition

Abstract

The mixed compound NaH2(PO4)0.48(AsO4)0.52.H2O, which has been examined by Raman spectroscopy, XRD powder and dielectric, exhibits solid–solid phase transitions and one reversible solid–liquid phase transition. Besides, the investigation of dehydration behavior of sodium dihydrogenate phosphate-arsenate monohydrate was undertaken in a temperature range from 253 K to 333 K. The onset temperature of dehydration was determined from changes in ionic conductivity and X-ray powder on heating. It was confirmed by the Raman study not only in the disappearance of the vibrations assigned to the PO4, AsO4  but also in the appearance of the new vibrations attributed to the (PO3), which constitutes the P-O-P chain, giving a polymer with the formula: NaH2(P2O7)x(As2O7)(1-x).  The important variation was observed in all studies at 313 K, which could correspond to the transformation of the NDAP compounds of a solid crystal into a liquid form.

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References

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Published

2014-07-31

How to Cite

Jarraya, K., Mhiri, T., & Le Goff, X. (2014). Dehydration and decomposition behavior of the NaH2(PO4)0,48AsO4)0,52.H2O compound in the temperature range from 253 K to 333 K. JOURNAL OF ADVANCES IN CHEMISTRY, 10(3), 2484–2490. https://doi.org/10.24297/jac.v10i3.6655

Issue

Vol. 10 No. 3 (2014)

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Articles

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