2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/208266X-ray scattering by multiferroic LuFe2O4 is reported. Below 320 K, superstructure reflections indicate an incommensurate charge order with propagation close to (1/3,1/3,3/2). The corresponding charge configuration, also found by electronic structure calculations as most stable, contains polar Fe/O double-layers with antiferroelectric stacking. Diffuse scattering at 360 K, with (1/3,1/3,0) propagation, indicates ferroelectric short-range correlations between neighboring double-layers. The temperature dependence of the incommensuration indicates that charge order and magnetism are coupled.v2: added more details on representation analysis; edited for accessibility to general readership. PRL in printStrongly Correlated ElectronsMaterials Sciencetext