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The relationship between dislocations and molecular structure in aromatic crystals

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Abstract

Topographical studies of cleaved anthraquinone crystals provide evidence for twinning on (20¯1) in accordance with the predictions of the sense of angle (SA) mechanism. Supplementary studies on etched, as-grown and cleaved crystals of anthraquinone and p-terphenyl, and a comparison of the results with the available data on anthracene, reveal that the dislocation arrangements in the three isostructural solids can be interpreted in terms of the relative dimensions of the unit cells. In anthraquinone, the (100) [010] slip system is found to be of greater significance than the (001) [010] system, which is dominant in anthracene, whereas the near orthorhombic nature of the p-terphenyl structure results in slip being favoured on (1¯10). Twinning and glide are common to (20¯1) of anthraquinone, whereas glide alone has been observed on (20¯1) of anthracene and (201) of p-terphenyl. Possible partial dislocations and associated stacking faults are discussed.

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References

  1. 1.

    F. C. Frank, A. Keller, and A. O'Connor, Phil. Mag. 3 (1958) 64.

  2. 2.

    V. F. Holland and P. H. Lindenmayer, J. Appl. Phys. 36 (1965) 3049.

  3. 3.

    R. B. Gordon, Acta Met. 13 (1965) 199.

  4. 4.

    P. M. Robinson and H. G. Scott, Phys. Stat. Sol. 20 (1967) 461.

  5. 5.

    J. O. Williams and J. M. Thomas, Trans. Faraday Soc. 63 (1967) 1720.

  6. 6.

    J. N. Sherwood, Brookhaven Conference on Organic Solid State Chemistry, 1968, to be published in Molecular Crystals.

  7. 7.

    P. J. Jackson, Acta Met. 13 (1965) 1057.

  8. 8.

    W. Connick and F. G. J. May, J. Crystal Growth 5 (1969) 65.

  9. 9.

    J. M. Thomas and J. O. Williams, Trans. Faraday Soc. 63 (1967) 1922.

  10. 10.

    D. P. Craig, R. Mason, P. Pauling, and D. P. Santry, Proc. Roy. Soc. A286 (1965) 98.

  11. 11.

    J. M. Thomas and J. O. Williams, in “Organic Solid State Chemistry”, edited by G. Adler (Gordon and Breach, London, 1969) in press.

  12. 12.

    A. I. Kitaigorodskii, in “Organic Chemical Crystallography” (Consultants Bureau, New York, 1965).

  13. 13.

    P. M. Robinson and H. G. Scott, Acta Met. 15 (1967) 1230.

  14. 14.

    K. Oyama and I. Nakada, J. Phys. Soc. Japan 24 (1968) 798.

  15. 15.

    J. N. Sherwood and S. J. Thomson, J. Sci. Instr. 37 (1960) 242.

  16. 16.

    R. W. Cahn, Adv. in Phys. 3 (1954) 363.

  17. 17.

    G. M. Wolten and A. B. Chase, J. Chem. Phys. 41 (1964) 2966.

  18. 18.

    P. M. Robinson and H. G. Scott, J. Crystal Growth 1 (1967) 187.

  19. 19.

    J. J. Gilman and W. G. Johnson, Solid State Physics 13 (1962) 148.

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Williams, J.O., Adams, I. & Thomas, J.M. The relationship between dislocations and molecular structure in aromatic crystals. J Mater Sci 4, 1064–1068 (1969). https://doi.org/10.1007/BF00549845

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Keywords

  • Polymer
  • Molecular Structure
  • Anthracene
  • Slip System
  • Anthraquinone