Structure and Phase Transitions in V2D and V2H

  • S. C. Moss
Part of the NATO Conference Series book series (NATOCS, volume 6)


The structure and phase transitions in V2D and V2H are reviewed. Prior neutron studies of site occupancy and phase transitions are compared with more recent x-ray studies in which the interstitial ordering is accompanied by modulated host atom displacements. This has permitted x-ray scattering to be used as a sensitive probe of both the ordered and disordered states. We suggest that the transfer from disordered tetrahedral to ordered octahedral occupancy occurs through a [1/2 1/2 0] modulation wave which slides, on cooling, from local tetrahedral to local octahedral modulation. New results on the second order phase transition in V2H suggest that it is an excellent example of an Ising-like transition modified by the presence of a nearby tricritical point.


Phase Transition Order Phase Transition Tetrahedral Site Site Occupancy Tricritical Point 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    V. A. Somenkov, I. R. Entin, A. Yu Chervyakov, S. Sh. Shil’shtein, and A. A. Cherykov, Sov. Phys. Solid State 13, 2178 (1972).Google Scholar
  2. 2.
    D. G. Westlake, M. H. Mueller and H. W. Knott, J. Appl. Cryst. 6, 206 (1973).CrossRefGoogle Scholar
  3. 3.
    H. Asano and M. Hirabayashi, Phys. Stat. Solidi A 15, 269 (1973)ADSCrossRefGoogle Scholar
  4. 4.
    H. Asano and M. Hirabayashi, Proc. Second Int’l. Cong. on Hydrogen in Metals, Paris (1977), paper 1D6.Google Scholar
  5. 5.
    H. Asano, Y. Abe and M. Hirabayashi, Acta Met. 24, 95 (1976);CrossRefGoogle Scholar
  6. H. Asano, Y. Abe and M. Hirabayashi, J. Phys. Soc. Japan 41, 974 (1976).ADSCrossRefGoogle Scholar
  7. 6.
    T. Schober and H. Wenzl in: “Hydrogen in Metals-II, ed. G. Alefeld and J. Völke, Topics in Appl. Phys. 28 ( Springer-Verlag, Berlin, 1978 ) p. 77.Google Scholar
  8. 7.
    I. R. Entin, V. A. Somenkov and S. Sh. Shil’shetein, Sov. Phys. Solid State 16, 1569 (1975).Google Scholar
  9. 8.
    M. Hirabayashi, Proc. Jimis-2, Hydrogen in Metals, 1980 p. 49.Google Scholar
  10. 9.
    F. Reidinger, Brookhaven National Lab, unpublished results (1978).Google Scholar
  11. 10.
    J. J. Rush and H. E. Flotow, J. Chem. Phys. 48, 3795 (1968).ADSCrossRefGoogle Scholar
  12. 11.
    H. Metzger, H. Jo, S. C. Moss and D. G. Westlake, Phys. Stat. Solidi (a) 47, 631 (1978).ADSCrossRefGoogle Scholar
  13. 12.
    H. S. U. Jo, S. C. Moss and D. G. Westlake, J. Appl. Cryst. 13, 486 (1980).CrossRefGoogle Scholar
  14. 13.
    H. Metzger, H. Jo, and S. C. Moss, Proc. of the Int’l. Meeting on Hydrogen in Metals, Münster 1979, Zeit Phys. Chem. 116, 87 (1979).Google Scholar
  15. 14.
    V. F. Petrunin, V. A. Somenkov, S. Sh. Shil’shtein and A. A. Chertkov, Sov. Phys. Crystallography 15, 137 (1970).Google Scholar
  16. 15.
    H. Asano, K. Kishi and M. Hirabayashi, Proc. Jimis-2, Hydrogen in Metals, 1980 p. 93.Google Scholar
  17. 16.
    H. S. U. Jo and S. C. Moss, Sol. St. Commun. 30, 365 (1979).ADSCrossRefGoogle Scholar
  18. 17.
    A. G. Khachaturyan and G. A. Shatalov, Acta Met. 23, 1089 (1975).CrossRefGoogle Scholar
  19. 18.
    H. S. U. Jo and S. C. Moss, AIP Conf. Proc. No. 53 (Modulated Structures) p. 400 (1979).ADSCrossRefGoogle Scholar
  20. 19.
    E. Burkel, H. Behr, H. Metzger and J. Peisl, Phys. Rev. Lett. 46, 1078 (1981); see also J. Peisl, this conference.Google Scholar
  21. 20.
    H. S. U. Jo, S. C. Moss and D. G. Westlake, AIP Conf. Proc. No. 53 (Modulated Structures) p. 403 (1979).ADSCrossRefGoogle Scholar
  22. 21.
    W. Pesch, T. Schober and H. Wenzl, Scripta Met. (1982) in press; T. Schober, this conference.Google Scholar
  23. 22.
    H. S. U. Jo, unpublished results (1979). (The publication of this data was postponed until a proper assessment of the order of the transition could be made; see ref. 24).Google Scholar
  24. 23.
    H. E. Stanley, Introduction to Phase Transitions and Critical Phenomena, New York, Oxford University Press (1971).Google Scholar
  25. 24.
    B. Schönfeld, research in progress; B. Schönfeld and S. C. Moss, Bull. Am. Phys. Soc. 27, 162 (1982).Google Scholar
  26. 25.
    M. D. Rechtin, S. C. Moss and B. L. Averbach, Phys. Rev. Lett. 24, 1485 (1970).ADSCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • S. C. Moss
    • 1
  1. 1.Physics DepartmentUniversity of HoustonHoustonUSA

Personalised recommendations