Papers by Abdelaziz El Jazouli
The phosphates with general formulas Cu x Nb 1−x Ti 1+x (PO 4 ) 3 (0≤x≤1) and Cu 1+x Cr x Ti 2−x ... more The phosphates with general formulas Cu x Nb 1−x Ti 1+x (PO 4 ) 3 (0≤x≤1) and Cu 1+x Cr x Ti 2−x (PO 4 ) 3 (0≤x≤1) belong to the Nasicon-type structure. The position of copper in the lattice has been investigated by X Ray-diffraction and EPR Les phosphates de formule generale Cu x Nb 1−x Ti 1+x (PO 4 ) 3 (0<x<1) et Cu 1+x Cr x Ti 2−x (PO 4 ) 3 (0<x<1) appartiennent au type structural Nasicon. La position des atomes de cuivre est determinee par diffraction RX et RPE
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Journal of Non-Crystalline Solids, 2016
Abstract Phosphate glasses having the general formula (100-x) NaPO3-x SrO with an O/P ratio varyi... more Abstract Phosphate glasses having the general formula (100-x) NaPO3-x SrO with an O/P ratio varying between 3 and 3.25 were synthesized by melt quenching technique. The glasses are studied in order to determine the influence of SrO addition on the structural and physical-chemical properties. Density, glass transition and crystallization temperatures increase with SrO content, showing the shrinking and reticulation of phosphate network. The chemical durability of the glass series is enhanced by the substitution of Na2O and P2O5 by SrO. Fourier Transform Infrared Spectroscopy and 31P Magic Angle Spinning Nuclear Magnetic Resonance spectroscopies revealed the depolymerisation of the glass network by the decrease of middle chain units to create end chain units species. Calorimetric study of the dissolution of glasses in acid solution shows a decrease of the dissolution enthalpy when the SrO is added.
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Phosphorus Research Bulletin, 2004
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Phosphorus Research Bulletin, 2004
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Acta Crystallographica Section A Foundations of Crystallography, 2005
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LCMS/LCPCE-URAC17, Faculté des Sciences Ben M’Sik, Université Hassan II, Casablanca, Morocco. LPC... more LCMS/LCPCE-URAC17, Faculté des Sciences Ben M’Sik, Université Hassan II, Casablanca, Morocco. LPCMI, Faculté des Sciences Ain Chock, Université Hassan II, Casablanca, Morocco. LASMAR-URAC11, Faculté des Sciences, Université Moulay Ismaïl, Meknès, Morocco. Université de Bordeaux, CNRS, ISM UMR 5255, 351 cours de la Libération, F-33405 Talence Cedex, France. Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina, USA. !
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Mediterranean Journal of Chemistry
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Journal of Non-Crystalline Solids, 2016
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Acta Crystallographica Section A Foundations and Advances, 2014
Interest in mixed metals titanium phosphates, both in glass and crystalline forms, for their prop... more Interest in mixed metals titanium phosphates, both in glass and crystalline forms, for their properties as ionic conductors or non-linear optical materials, has led to large number of studies of these materials [1-3]. Our investigation of Na2O – Li2O – CaO – TiO2 – P2O5 system led to the discovery of NaxLiyCazTit(PO4)3 solid solutions which exist in both glassy and crystalline forms. Here the preparation of NaxLiyCazTit(PO4)3 will be described. The compounds were structurally characterized by PXRD, and their chemical and physical characterization were completed using DTA, XRD, UV-visible, Raman spectroscopy and ionic conductivity measurements. NaxLiyCazTit(PO4)3 glasses have been prepared by heating stochiometric amounts of Na2CO3, Li2CO3, CaCO3, TiO2 and NH4H2PO4 in a platinum crucible at 10500C. The microcrystalline samples were obtained by crystallization of the corresponding glasses at 6400C or by standard solid state preparation at 7000C. The values of the characteristic temper...
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Journal of Solid State Chemistry
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ABSTRACT
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Cu/sub 0.50/Tiâ(POâ)â is a Nasicon-type phase with a cooperative Jahn-Teller distortion below 550... more Cu/sub 0.50/Tiâ(POâ)â is a Nasicon-type phase with a cooperative Jahn-Teller distortion below 550°C. Crystal field, electron paramagnetic resonance, and magnetic data seem to be consistent with an octahedral surrounding and a d/sub x²-y²/¹ ground state of Cu/sup 2 +/.
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Cu/sub 0.50/Tiâ(POâ)â is a Nasicon-type phase with a cooperative Jahn-Teller distortion below 550... more Cu/sub 0.50/Tiâ(POâ)â is a Nasicon-type phase with a cooperative Jahn-Teller distortion below 550°C. Crystal field, electron paramagnetic resonance, and magnetic data seem to be consistent with an octahedral surrounding and a d/sub x²-y²/¹ ground state of Cu/sup 2 +/.
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ABSTRACT
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Materials Research Bulletin
ABSTRACT
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ABSTRACT
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Journal of Solid State Chemistry
ABSTRACT
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Acta Crystallographica Section A Foundations of Crystallography, 2011
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Papers by Abdelaziz El Jazouli