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  1. No Access

    Article

    Uptake of some lanthanides on γ-zirconium phosphate-phosphite and its 1,10-phenanthroline and 2,2-bipyridyl intercalated products

    γ-Zirconium phosphate-phosphite, γ-Zr·PO4·H2PO3·2H2O, (γ-ZrPP), was prepared and characterized. Direct treatment of γ-zirconium phosphate-phosphite with an ethanol solution of 0.1M 1,10-phenanthrolin and 2,2'-bip...

    S. K. Shakshooki, H. B. El Hanash… in Journal of Radioanalytical and Nuclear Che… (1999)

  2. No Access

    Article

    Adsorption of some lanthanides on glassy tin arsenate

    Glassy tin arsenate, Sn(HAsO4)2·2.7H2O (SnAs) was prepared and characterized. The uptake of lanthanide ions La3+, Sm3+, Eu3+, and Yb3+ was followed on the glassy tin arsenate in HNO3 solution at pH 1,2 and 4. The...

    S. K. Shakshooki, E. A. Arafa, F. Y. Siala… in Journal of Radioanalytical and Nuclear Che… (1999)

  3. No Access

    Article

    Thermoanalytical Investigation of Several Layered Zirconium Salts and their Derivatives Part II

    The comparison of data of thermal analysis partly with XRD and/or analytical results permits determination of the exact quantity of crystal water of the investigated samples having quite different behaviour. T...

    L. Szirtes, A. M. Szeleczky, A. O. Rajeh… in Journal of Thermal Analysis and Calorimetry (1998)

  4. No Access

    Article

    Thermoanalyncal Investigation of Some Layered Zirconium Salts and Their Various Derivatives I.

    The thermal behaviour of zirconium phosphate and its salt forms and also mixed zirconium-titanium phosphate were investigated. Based on TA data, in combination with other analytical results the composition, th...

    L. Szirtes, S. K. Shakshooki… in Journal of Thermal Analysis and Calorimetry (1998)

  5. No Access

    Article

    Thermal behaviour of acidic salts of mixed tetravalent metals

    The mixed amorphous glassy-type zirconium-titanium phosphates contain various quantities of adsorbed water per molecule unit. Pure zirconium phosphate lost the structural water in two steps. This character dis...

    L. Szirtes, S. K. Shakshooki, Z. Pokó, L. Pavlovszki in Journal of Thermal Analysis (1993)

  6. No Access

    Article

    Thermal behaviour of acidic salts of mixed tetravalent metals

    The mixed metal phosphates were synthetized by the HF method, the resulting materials being crystalline. Thermal analysis revealed that they contain almost one mole of crystalline water per molecule unit. The ...

    S. K. Shakshooki, S. A. Khalil, A. S. M. Abuhamaira… in Journal of thermal analysis (1992)

  7. No Access

    Article

    Mixed insoluble acidic salts of tetravalent metals

    Mixed amorphous glassy type hafnium-titanium phosphates have been prepared. The composition and ion exchange capacity of the samples were investigated before and after γ-irradiation. In addition, the effect of...

    S. K. Shakshooki, Y. Elmismary, A. Dehair… in Journal of Radioanalytical and Nuclear Che… (1992)

  8. No Access

    Article

    Selectivity of glassy type mixed zirconium-titanium phosphate toward rare earth metal ions

    The selectivity of glass type mixed Zr+Ti phosphates with various Ti contents has been investigated toward rare earth metal ions. The kd values were determined by radiotracer technique both in HCl and HNO3 soluti...

    S. K. Shakshooki, A. Dhair, L. Szirtes… in Journal of Radioanalytical and Nuclear Che… (1991)

  9. No Access

    Article

    Selectivity of mixed zirconium-titanium phosphates toward transition metals

    Mixed zirconium-titanium phosphates were synthesized by various methods and under various conditions. The effect of these conditions on the selectivity of synthetized samples toward the transition metal ions w...

    S. K. Shakshooki, L. Szirtes… in Journal of Radioanalytical and Nuclear Che… (1990)

  10. No Access

    Article

    Thermal behaviour of acidic salts of mixed tetravalent metals

    Mixed zirconium-titanium phosphate samples were irradiated in a gamma-radiation facility with a Co-60 source. The adsorbed dose was 106 Gy. At this dose, a change in thermal bahaviour was found only for the sampl...

    L. Szirtes, J. Kern, L. Pavlovszki, S. K. Shakshooki… in Journal of thermal analysis (1990)

  11. No Access

    Article

    Thermal behaviour of acidic salts of mixed tetravalent metals

    The results of investigations on intercalated crystalline zirconium phosphate are described in the literature. The behaviour of crystalline phosphates containing both zirconium and titanium metal ions has not ...

    L. Szirtes, J. Kern, L. Pavlovszki, S. K. Shakshooki… in Journal of thermal analysis (1989)

  12. No Access

    Article

    Effect of gamma-radiation on amorphous mixed zirconium-titanium phosphates

    A precipitation method was used to prepare amorphous mixed zirconium-titanium phosphates with various titanium contents. In this way the acidic solutions of ZrOCl2.8H2O and TiCl4 in various ratios were rapidly mi...

    S. K. Shakshooki, L. Szirtes in Journal of Radioanalytical and Nuclear Chemistry (1989)

  13. No Access

    Article

    Mixed insoluble acidic salts of tetravalent metals

    Mixed amorphous, glassy type, zirconium-titanium arsenate (ZrTiAs) and hafniumtitanium arsenate (HfTiAs) have been prepared. The composition and exchange capacity of the prepared samples were investigated in c...

    S. K. Shakshooki, F. Masaodi, A. Dehair… in Journal of Radioanalytical and Nuclear Che… (1989)

  14. No Access

    Article

    Mixed insoluble acidic salts of tetravalent metals

    Solid amorphous Zr-, Ti- and ZrxTi(1−x) phosphates (where x=0.10, 0.33, 0.66, and 0.90) in various sodium forms were contacted with an excess of solid oxalic acid dihydrate to its molten state for a given time. T...

    S. K. Shakshooki, L. Szirtes, A. Azrak… in Journal of Radioanalytical and Nuclear Che… (1989)

  15. No Access

    Article

    Conversion of solid amorphous mixed zirconium-titanium phosphates into crystalline from by molten oxalic acid

    Solid amorphous mixed zirconium-titanium phosphates, with general formula ZrxTi/1−x//HPO4/2.n H2O/ where x=0.1−1, and n=3–5/, are mixed with an excess of solid oxalic acid dihydrate and digested in molten oxalic ...

    S. K. Shakshooki, L. Szirtes, A. Azrak… in Journal of Radioanalytical and Nuclear Che… (1989)

  16. No Access

    Article

    Thermal behaviour of mixed tetravalent metal salts

    In contrast with the well-known zirconium and titanium phosphates, products containing these metal ions together are unknown. To investigate the thermal behaviour of such materials, samples were synthetized wi...

    L. Szirtes, Z. Pokó, S. K. Shakshooki, M. Ahmed, A. Dehair… in Journal of thermal analysis (1989)

  17. No Access

    Article

    Mixed insoluble acidic salts of tetravalent metals VI. Crystalline mixed zirconium-titanium arsenate and hafnium-titanium arsenate

    Mixed crystalline zirconium-titanium arsenates ZrxTi(1−x) (HAsO4)2·H2O and harnium-titanium arsenates HfxTi(1−x) (HAsO4)2 H2O (where x=0–1) of various compositions with different Zr/Ti or Hf/Ti ratios have been p...

    S. K. Shakshooki, N. Naqvi, L. Szirtes… in Journal of Radioanalytical and Nuclear Che… (1988)

  18. No Access

    Article

    Mixed insoluble acidic salts of tetravalent metals V. Effect of gamma radiation and drying temperature on granular mixed zirconium-titanium phosphates

    Solid ZrOCl2·8H2O was added in a slow stream to a solution of phosphoric acid or to a solution of TiCl4 in phosphoric acid to obtain granules of amorphous Zr(HPO4)2·nH2O or ZrxTi(1−x) (HPO4)2·nH2O(where x=0.95−0....

    S. K. Shakshooki, L. Szirtes, A. Dehair… in Journal of Radioanalytical and Nuclear Che… (1988)

  19. No Access

    Article

    Conversion of solid amorphous zirconium and hafnium phosphates into alpha crystalline form via molten oxalic acid

    Solid amorphous zirconium phosphate /ZPa/ and hafnium phosphate /HPa/ are mixed with an excess of solid oxalic acid dihydrate and are digested in molten oxalic acid. Then oxalic acid is removed by extraction o...

    S. K. Shakshooki, N. Naqvi in Journal of Radioanalytical and Nuclear Chemistry (1988)