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The article describes three-dimensional (3D) reconstruction of the v-AlCrFe phase by electron crystallography. High-resolution transmission-electron microscopy (HREM) images and selected-area electron diffraction patterns from 13 different zone axes were combined to give a 3D potential map. Electron crystallography is a powerful method for solving structures of crystals with submicrometre sizes, which are too small for X-ray crystallography. 3D reconstruction from HREM images offers a new possibility for ab initio structure determination of inorganic compounds existing only with very small crystal sizes.