[en] This article describes a detailed investigation of the crystallographic and magnetic structure of perovskite type Ba₃Fe₃O₇F by a combined analysis of X-ray and neutron powder diffraction data. Complete ordering of vacancies within the perovskite lattice could be confirmed. In addition, the structure of the anion sublattice was studied by means of the valence bond method, which suggested partial ordering of the fluoride ions on two of the six crystallographically different anion sites. Moreover, the compound was found to show G-type antiferromagnetic ordering of Fe moments, in agreement with magnetometric measurements as well as previously recorded ⁵⁷Fe Mössbauer spectroscopy data. - Graphical abstract: The vacancy and anion ordered structure of Ba₃Fe₃O₇F is described together with its magnetic properties. - Highlights: • Ba₃Fe₃O₇F possesses a unique vacancy order not found for other perovskite type compounds. • The valence bond method was used to locate oxide and fluoride ions. • Fluoride ions are distributed only on two of the six anion sites in Ba₃Fe₃O₇F. • The compound shows G-type antiferromagnetic ordering of magnetic moments. • The magnetic structure could be refined in one of the maximal magnetic subgroups of the nuclear structure.