4. Conclusion

Electron diffraction techniques complement each other very well, as do X-rays and neutrons.

The various electron diffraction techniques described in this series of files each have their own advantages and specific features. They must be chosen in response to the problem at hand. Indeed, they vary in difficulty. Often, the simplest - area-selective diffraction and microdiffraction - provide the desired information: recognition of a predictable crystal and its orientation. When the crystal is unknown, access to its space group requires a combination of microdiffraction and convergent beam diffraction, but only after area-selective diffraction has explored the reciprocal lattice. The characterization of defects, if their study in image mode is not easy, leads to the use of the wide-angle convergent beam technique.

The choice of method also...