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An x-ray topographic study of defect structures in cyclotrimethylene trinitramine

1971; Wiley; Volume: 8; Issue: 2 Linguagem: Inglês

10.1002/pssa.2210080220

1521-396X

I. T. McDermott, P. P. Phakey,

Energetic Materials and Combustion

physica status solidi (a)Volume 8, Issue 2 p. 505-511 Original Paper An x-ray topographic study of defect structures in cyclotrimethylene trinitramine I. T. McDermott, I. T. McDermott Australian Defence Scientific Service, Defence Standards Laboratories, MelbourneSearch for more papers by this authorP. P. Phakey, P. P. Phakey Department of Physics, Monash University, Clayton AustrialiaSearch for more papers by this author I. T. McDermott, I. T. McDermott Australian Defence Scientific Service, Defence Standards Laboratories, MelbourneSearch for more papers by this authorP. P. Phakey, P. P. Phakey Department of Physics, Monash University, Clayton AustrialiaSearch for more papers by this author First published: 16 December 1971 https://doi.org/10.1002/pssa.2210080220Citations: 19AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstracten Low-defect-density crystals of cyclotrimethylene trinitramine have been grown from solution by slow cooling and examined by X-ray transmission topography (Lang method). Well-defined pendellösung fringe systems, line defects radiating from the seed crystal, and “granular” structures have been observed. The extinction distance for a given reflection has been calculated from the fringe spacing and compared with the value derived from the structure factor. The line defects are shown to be grown-in dislocations whose character and Burgers vector have been determined in some cases. An explanation is suggested for the “granular” structures. Abstractde Kristalle von Zyklo-Trimethylen-Trinitramin mit niedriger Defektkonzentration wurden aus der Lösung durch langsames Abkühlen gezüchtet und mit Röntgenstrahltransmissionstopographie (Lang-Methode) untersucht. Wohldefinierte Pendellösung-Streifensysteme, Liniendefekte, die aus dem Kristallkeim ausstrahlen, und „Granular”︁-Strukturen wurden beobachtet. Die Extinktionsweite für eine vorgegebene Reflexion wurde aus dem Streifenabstand berechnet und mit dem Wert verglichen, der aus dem Strukturfaktor berechnet wurde. Es wird gezeigt, daß die Liniendefekte ursprüngliche Versetzungen sind, deren Charakter und Burgersvektoren in einigen Fällen bestimmt wurden. Eine Erklärung für die „Granular”︁-Struktur wird vorgeschlagen. References 1 P. M. Harris, Structure of Trinitroaromatic Crystals and Related Substances, AFOSR-TR-59-165, Ohio State University Research Foundation, Columbus. Ohio 1959. 2 W. Connick and F. G. J. May, J. Crystal Growth 5, 65 (1969). 3 I. T. McDermott and P. P. Phakey, J. appl. Cryst., to be published. 4 K. A. Gross, J. Crystal Growth 6, 210 (1970). 5 S. R. Silva and K. A. Gross, Abstracts, Australian Conf. Electron Microscopy, Australian Academy of Science, Canberra 1968, Paper 34. 6 A. R. Lang, Acta cryst. 12, 249 (1959). 7 A. R. Lang, An Investigation of Crystal Imperfections by X-Ray Diffraction, Office of Aerospace Research – Final Report Contract AF 61 (052)-449, University of Bristol, 1966 (p. 102). 8 A. R. Lang, Advances in X-Ray Analysis, Vol. 10, Eds. J. B. Newkirk and G. R. Mallett, Plenum Press, New York 1967 (p. 91). 9 J. Friedel, Dislocations, Pergamon Press, 1964 (p. 45). 10 A. C. McLaren, C. F. Osborne, and L. A. Saunders, phys. stat. sol. (a) 4, 235 (1971). 11 D. P. Grigorev, Ontogeny of Minerals, Oldbourne Press, London 1965 (p. 56). 12 S. H. Emara, B. R. Lawn, and A. R. Lang, Phil. Mag. 19, 7 (1969). Citing Literature Volume8, Issue216 December 1971Pages 505-511 ReferencesRelatedInformation