Electron-diffraction pattern with "tenfold rotational symmetry" of Al-Fe alloyphase is assumed to be produced by periodic structure. One 3D periodic structure is presentedbased on so-called C polyhedra. The structure can be used as atomic model to describethe Al-Fe alloy phase. The Fourier transform patterns of the model are in good agreementwith the corresponding electron-diffraction patterns. Several other models with "tenfold symmetry" Fourier transform patterns have briefly been mentioned.