The geometrical structures, stabilities and electronic properties of
bimetallic mononuclear LinClK(0,+1) (n=1-6) clusters were studied within
the density functional theory. From the ground state geometries, the Cl
atom prefers the apex position and the K atom is at either side position
or at surface. The dissociation energy, second order energy difference
and GapHL (HOMO-LUMO gap) points out that LinClK(n=2,4,6) and the
LinClK+(n=1,3,5) clusters are more stable. According to their ionization
energies, the clusters can be classified as superalkalis, but the
systematic study signifying that noticeable ionisation energy difference
appears between the smallest bimetallic mononuclear superalkali compound
(LiClK) and rest of superalkali species. Upon ionisation, the detached
electron is from K atom. The delocalised electrons except the LiClK+
point out that the clusters are hyperlithiated clusters. The
delocalization type of 3c/2e is responsible from the higher stability of
the closed shell clusters.