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ODFex

Orientation Distribution Function Explorer

A simple visualization tool intended to help interpret or predict the azimuthal variation in X-ray powder diffraction data

  • 3D visualization of ODF (so far only fibre texture) in relation to the sample orientation
  • Visualization of the scattering vector $\vec{Q}$ and the contributing crystallite direction along the preferred orientation direction cone (POD)
  • Visualization of the azimuthal intensity variation of reflections at similar $2\theta$-values and their summed contribution
  • Easy drag-n-drop import of CIF files

Examples

The images below show the two main windows in ODFex, the main window containing the user input interface and a plot of the azimuthal intensities of the selected reflections, and the 3D sphere window showing the ODF along with several relevant vectors and cone segments.

ODFex main window example

ODFex 3D sphere window example

Acknowledgements

The visuals, naming convention, and underlying math is heavily inspired by Wright et al. (1996)

References

Wright, N. G., Nelmes, R. J., Belmonte, S. A., & McMahon, M. I. (1996). Observation and modelling of preferred orientation in two-dimensional powder patterns. Journal of Synchrotron Radiation, 3(3), 112-119.