Browsing by Author "Napier, JG"

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    Crystallographic computer programs for the electron microscopist.
    (Australian Atomic Energy Commission, 1978-02) Napier, JG
    A series of six main programs and eighteen associated subroutines is presented which covers most of the crystallographic computational requirements likely to arise in electron microscopy. The programs are designed to handle all crystal systems. The programs are written in FORTRAN-4, specifically to be run on an IBM360 computer using the FORTRAN H compiler. Where this is likely to cause difficulties in portability, the problems are mentioned in the text.
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    Crystallographic techniques and data for transmission electron microscopy of zirconium
    (Australian Atomic Energy Commission, 1970-02) Jostsons, A; Napier, JG
    The crystallography of hexagonal close packed metals is discussed briefly in terms of the four-axis hexagonal reference basis and the Miller-Bravais notation which are used throughout the report. Electron diffraction problems are treated with reference to the four-axis hexagonal reciprocal lattice rather than the more usual three-axis hexagonal system. Using these concepts, analysis of electron diffraction spot and Kikuchi patterns is illustrated and applied to orientation and dislocation Burgers vector determinations. Computed values of interplanar spacings, interplanar angles, angles between directions, and extinction distances for zirconium are listed.
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    The x-ray powder diffraction pattern and lattice parameters of perovskite
    (Australian Nuclear Science and Technology Organisation, 1988-02) Ball, CJ; Napier, JG
    The interplanar spacings and intensities of all lines appearing in the X-ray powder diffraction pattern of perovskite have been calculated. Many of the lines occur in groups with a large amount of overlap. As an aid to identifying the lines which are observed the intensity profiles of the major groups have been plotted. Those lines which are relatively free of overlap and can be identified unambiguously have been used to calculate the lattice parameters with the results a=5.4424 +- 0.0001 A b=7.6417 +- 0.0002 A c=5.3807 +- 0.0001 A.