Synthesis, crystal structure and spectroscopy properties of Na3AZr(PO4)3 (A=Mg, Ni) and Li2.6Na0.4NiZr(PO4)3 phosphates |
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| Authors: | M Chakir A El Jazouli |
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| Institution: | a LCMS, UFR Sciences des Matériaux Solides, Faculté des Sciences Ben M’Sik, UH2M, Avenue Idriss El Harti, BP 7955, Casablanca, Morocco
b Department of Chemistry, University of Pretoria, 0002 Pretoria, South Africa |
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| Abstract: | Na3AZr(PO4)3 (A=Mg, Ni) phosphates were prepared at 750 °C by coprecipitation route. Their crystal structures have been refined at room temperature from X-ray powder diffraction data using Rietveld method. Li2.6Na0.4NiZr(PO4)3 was synthesized through ion exchange from the sodium analog. These materials belong to the Nasicon-type structure. Raman spectra of Na3AZr(PO4)3 (A=Mg, Ni) phosphates present broad peaks in favor of the statistical distribution in the sites around PO4 tetrahedra. Diffuse reflectance spectra indicate the presence of octahedrally coordinated Ni2+ ions. |
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| Keywords: | Structure Nasicon X-ray diffaction Raman |
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