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  1. No Access

    Article

    FT-IR studies on intercalates and organic derivatives of crystalline (α- and γ-forms) zirconium phosphate and zirconium phosphate-phosphite

    FT-IR studies were carried out for various α- and γ-crystalline intercalates of zirconium phosphate (ZrP) and also for zirconium phosphatephosphite (ZrPP). The characteristic peaks of n-alkanols, n-alkylamines...

    A. O. Rajeh, L. Szirtes in Journal of Radioanalytical and Nuclear Chemistry (1999)

  2. No Access

    Article

    Structural investigations on zirconium phosphate-phosphite and on itsn-butylamine intercalate

    Zirconium phosphate-phosphite have various structure belonging to the drying heat of the sample. While sample dried above sat. NaCl solution had interlayer distance of 1.30 nm (result fromd 1=0.74 nm andd 2=0.56 ...

    A. O. Rajeh, L. Szirtes in Journal of Radioanalytical and Nuclear Chemistry (1995)

  3. No Access

    Article

    Investigations of crystalline structure of gamma-zirconium phosphate

    The γ-crystalline form zirconium phosphate was investigated. For its lattice parameters was found:a=0.538 nm,b=0.664 nm,c=2.459 nm, β=94.2° and basal spacing (d)=1.22 nm. It was determined by IR spectrophotometri...

    A. O. Rajeh, L. szirtes in Journal of Radioanalytical and Nuclear Chemistry (1995)

  4. No Access

    Article

    Structural modification of silica-containing α-zirconium phosphate

    Silica-containing α-zirconium phosphate (α-ZrSiP) was prepared by the precipitation method. X-ray diffractometry was used to characterize α-ZrSiP and to compare it with other α-zirconium phosphates (ZrP). A mo...

    L. Szirtes, E. Kuzmann in Journal of Radioanalytical and Nuclear Chemistry (1995)

  5. No Access

    Article

    Adsorption and microcalorimetric investigations ofn-butylamine intercalation in α- and γ-zirconium phosphates

    The intercalation process ofn-butylamine was investigated. The adsorption ofn-butylamine in interlamellar space had stepwise character in case of both crystalline forms of zirconium phosphate. The intercalatedn-b...

    I. Dékány, L. Szirtes in Journal of Radioanalytical and Nuclear Chemistry (1995)

  6. 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)

  7. No Access

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    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)

  8. 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)

  9. 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)

  10. 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)

  11. 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)

  12. 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)

  13. 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)

  14. No Access

    Article

    Mixed insoluble acidic salts of tetravalent metals IV. Crystalline mixed zirconium — Titanium phosphates

    Mixed crystalline alpha zirconium — titanium phosphates with variable zirconium to titanium ratios have been prepared both by the well known gel reflux method and a modified HF method. Chemical analysis, X-ray...

    S. K. Shakhooki, L. Szirtes, S. Khalil… in Journal of Radioanalytical and Nuclear Che… (1988)

  15. 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)

  16. No Access

    Article

    Investigation of silica gel supported inorganic ion exchangers

    Microcrystalline zirconium phosphate (α-ZrP), hydrous manganese dioxide (HMnO), ammonium molybdophosphate (AMP) and silica gel supported forms of these materials as well as silica gel (SG) itself were investig...

    So Van Le, L. Szirtes in Journal of Radioanalytical and Nuclear Chemistry (1986)

  17. No Access

    Article

    Silica gel supported microcrystalline zirconium phosphate ion exchanger (Si−ZrP) and its application in chemical separations

    Alkali metal ions and transition metal ions were separated on Si−ZrP ion exchanger. The distribution coefficients (Kd) and the relationship between the structure of Si−ZrP and its performance were determined.

    So Van Le, L. Szirtes in Journal of Radioanalytical and Nuclear Chemistry (1986)

  18. No Access

    Article

    Radio-paperchromatographic determination of different chemical forms of Ga

    Model experiments for Ga/Zn separation were carried out using Dowex 1 anion exchanger. Some chemical forms of Ga were identified by radio-paperchromatography and the Rf values have been determined.

    J. Környei, L. Szirtes, F. Kecskés in Journal of Radioanalytical and Nuclear Chemistry (1986)

  19. No Access

    Article

    Some considerations on the treatment of the kinetic data of heterogeneous isotope exchange

    A direct curve simulation treatment has been worked out for the evaluation of the kinetic curves of heterogeneous isotope exchange. Based on the data obtained by a personal computer some considerations have be...

    J. Környei, L. Szirtes, M. Lakatos in Journal of Radioanalytical and Nuclear Chemistry (1985)

  20. No Access

    Article

    Intercalation behaviour of organic derivatives of α-zirconium phosphate

    The intercalation behaviour of some organic derivatives of α-zirconium phosphate was investigated. Prepared organic derivatives of α-zirconium phosphate can be described by the general formula Zr(RPO3)X(R'PO3)2−X

    J. Környei, L. Szirtes, U. Costantino in Journal of Radioanalytical and Nuclear Chemistry (1985)

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