Further illustration of the hybridization types in three new carbon allotropes is obtained from the charge densities. Figure shows the projections represented by yellow volumes. In 'glitter' C 6 (Fig. ) the charge density on C1 exhibits a tetrahedral shape that is isolated from C2. Oppositely, a continuous charge density is observed between the two trigonal C2 carbon atoms aligned along the vertical c-direction with a red central color pointing to large charge concentration. Such behavior can be approached to the double C=C bond with and -like bonding. Similar features are observed in Fig. of 'isoglitter' C 8 , but the charge density is smeared throughout the cell as shown by the continuous yellow volumes along C1-C2-C2.