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Journal of Materials Science

, Volume 27, Issue 16, pp 4439–4446 | Cite as

Morphology of new superionic pyrophosphates

  • K. Byrappa
  • G. S. Gopalakrishna
  • B. V. Umesh Dutt
Papers

Abstract

New superionic pyrophosphates, Na2H3Al(P2O7)2, Na2CaMn2(P2O7)2, NaFeP2O7, Na2M2+Zr(P2O7)2 where M=Mn, Co, Ni and Zn, and (Na0.66Zr0.33)2P2O7 were obtained by a hydrothermal method. The crystal growth, solubility and structure of these superionic pyrophosphates are discussed in brief. Detailed morphological studies were carried out with reference to the divalent/trivalent cations, degree of supersaturation, concentration of volatiles such as Na2O, H2O, P2O5 etc.

Keywords

Polymer Crystal Growth P2O5 Supersaturation Pyrophosphate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J. J. Berstelius, Anna Physik 53 (1816) 393.CrossRefGoogle Scholar
  2. 2.
    H. P. Weber, T. C. Damen, H. G. Danielmeyer and B. C. Tofield, Appl. Phys. Lett. 22 (1973) 534.CrossRefGoogle Scholar
  3. 3.
    H. Y. P-Hong, J. B. Goodenough and J. A. Kafalas, Mater. Res. Bull. 11 (1976) 203.CrossRefGoogle Scholar
  4. 4.
    B. N. Litvin, K. Byrappa and L. G. Bebikh, Prog. Crystal Growth Charact. 3 (1981) 257.CrossRefGoogle Scholar
  5. 5.
    Ph. Colomban, in “VIth International Conference on High Tech Ceramics”, Milano, Italy, 24–30 July 1986.Google Scholar
  6. 6.
    J. M. Stanley, Ind. Engng Chem. 46 (1954) 1684.CrossRefGoogle Scholar
  7. 7.
    H. Y. P-Hong, Mater. Res. Bull. 11 (1976) 173.CrossRefGoogle Scholar
  8. 8.
    S. Gali, K. Byrappa and G. S. Gopalakrishna, Acta. Crystallogr. C45 (1989) 1667.Google Scholar
  9. 9.
    K. Byrappa, G. S. Gopalakrishna and S. Gali, Ind. J. Phys. 63A (4) (1989) 321.Google Scholar
  10. 10.
    S. Gali and K. Byrappa, Acta. Crystallogr. C46 (1990).Google Scholar
  11. 11.
    K. Byrappa, B. V. Umesh Dutt, A. B. Kulkarni and S. Gali, in “XXII National Seminar on Crystallography”, Calcutta, India, 26–28 December 1990.Google Scholar
  12. 12.
    M. Yoshimura, K. Fuji and S. Somiya, Mater. Res. Bull. 16 (1981) 327.CrossRefGoogle Scholar
  13. 13.
    K. Byrappa and B. N. Litvin, J. Mater. Sci. 18 (1983) 703.CrossRefGoogle Scholar
  14. 14.
    K. Byrappa, G. S. Gopalakrishna, V. Venkatachalapathy and B. Puttaraju, ibid. 20 (1985) 1419.CrossRefGoogle Scholar
  15. 15.
    J. W. Gibbs, “Collected Works” (Longman Green, London, 1925).Google Scholar
  16. 16.
    R. Kern, in “Growth of Crystals”, Vol. 8, edited by N. N. Sheftal (Consultants Bureau, New York, 1969).Google Scholar
  17. 17.
    A. F. Wells, Phil. Mag. 37 (1946) 184.CrossRefGoogle Scholar
  18. 18.
    J. W. Mullin, “The Inagural Lecture on Crystallization — A study in Molecular Engineering” (University College of London, UK, 1970).Google Scholar
  19. 19.
    K. S. Pillai and M. A. Ittyachen, Ind. J. Pure Appl. Phys. 15 (1977) 204.Google Scholar
  20. 20.
    K. Nassau, A. S. Cooper, J. W. Shiever and B. E. Prescott, J. Solid State Chem. 8 (1973) 260.CrossRefGoogle Scholar
  21. 21.
    A. R. Patel, J. Ind. Inst. Sci. 57 (1985) 193.Google Scholar
  22. 22.
    A. R. Patel and A. V. Rao. J. Crystal Growth 38 (1977) 288.CrossRefGoogle Scholar
  23. 23.
    H. E. Buckley, Mem. Proc. Manchester Lit. Phil. Soc. 83 (1939) 31.Google Scholar
  24. 24.
    K. Byrappa, in “Hydrothermal Reactions”, edited by S. Somiya (Elsevier Applied Science, 1990) pp. 433–456.Google Scholar

Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • K. Byrappa
    • 1
  • G. S. Gopalakrishna
    • 1
  • B. V. Umesh Dutt
    • 1
  1. 1.Mineralogical InstituteUniversity of MysoreMysoreIndia

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