The crystal structure of γ-alumina was revealed by electron crystallography and its transformation mechanism from boehmite is proposed.

The complex oxide YCuO_2.66 is shown to be twinned at the nanoscale. Its structure was solved using precession electron diffraction.

The Guest Editors of the special issue, Joke Hadermann and Lukáš Palatinus, introduce the collection of papers.

The development of a proper refinement algorithm that takes into account dynamical scattering guarantees, for electron crystallography, results approaching X-rays in terms of precision, accuracy and reliability. The combination of such dynamical refinement and electron diffraction tomography establishes a complete pathway for the structure characterization of single sub-micrometric crystals.

Electron crystallography has made enormous progress over the last decade. It can provide the necessary information that complements powder diffraction data and allows for successful structure analysis of modulated (and unmodulated) structures.

The crystal structures of the α and β modifications of PTCDA were analyzed as projected structures on the (102) planes by electron crystallography using an imaging plate.

The crystal structure of C₆₀ at liquid helium temperature was examined by electron diffraction using an imaging plate and cryo-TEM. The R factor could be reduced a certain amount by assuming a multi-component crystal.

Solution of crystal structures from electron-diffraction intensity data is reviewed. Important applications include small organics, lipids, linear polymers, membrane proteins and even a variety of inorganic materials.