Mechanical stability was derived from elastic constants calculations . The phonon dispersion band structures were calculated to verify the dynamic stability of the carbon allotropes. The phonon modes were calculated considering the harmonic approximation through finite displacements of the atoms around their equilibrium positions to obtain the forces from the summation over the different configurations. The phonon dispersion curves along the direction of the Brillouin zone were then obtained using the interface code "Phonopy" based on the Python language . The CIF files and the structure sketches including the tetrahedral representations were generated using the VESTA software . The electronic band structures and densities of states were obtained with the fullpotential augmented spherical wave ASW method based on DFT using the same GGA scheme as above .