title: Statistical estimation of atomic positions from exit wave reconstruction with a precision in the picometer range.
abstract: The local structure of Bi4W2/3Mn1/3O8Cl is determined using quantitative transmission electron microscopy. The electron exit wave, which is closely related to the projected crystal potential, is reconstructed and used as a starting point for statistical parameter estimation. This method allows us to refine all atomic positions on a local scale, including those of the light atoms, with a precision in the picometer range. Using this method one is no longer restricted to the information limit of the electron microscope. Our results are in good agreement with x-ray powder diffraction data demonstrating the reliability of the method. Moreover, it will be shown that local effects can be interpreted using this approach.
authors.affiliation: Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium. Sara.Bals@ua.ac.be
authors.forename: Sara
authors.initials: S
authors.lastname: Bals
authors.forename: Sandra
authors.initials: S
authors.lastname: Van Aert
authors.forename: Gustaaf
authors.initials: G
authors.lastname: Van Tendeloo
authors.forename: David
authors.initials: D
authors.lastname: Avila-Brande