Elastic electron scattering from 4N nuclei in the α-cluster model with dispersion

. The α -cluster model with dispersion has been developed for some 4 N nuclei in the 2 s -1 d shell. The previously considered molecule-like configuration for the 24 Mg nucleus is compared with the octahedron one. For the 32 S nucleus both the cubic and bitetrahedron configurations are discussed. Molecule-like configurations with the 32 S nucleus core and additional dumb-bell for the 40 Ca nucleus are proposed. The structure of the 40 Ca nucleus consisting of six α -clusters arranged in a octahedron outside of tetrahedron 16 O core is also considered. The calculated charge form factors and root mean square radii of such nuclei are in a reasonable agreement with the available experimental data.