Abstract
Van der Waals (VdW) interactions constitute a rather small component in the cohesive energy of ionic crystals. The contributions of the VdW and the short range repulsion becomes more and more predominant at successive differentiations of the lattice energy as compared to the coulomb contributions because of their particular nature of dependence on the lattice parameter. The complete Van der Waals (VdW) contributions to the equilibrium condition and the second order elastic constant for NaCl and CsCl structure alkali halides have been derived in this paper..
Keywords
VdW, Lattice parameter, Elastic constants, Alkali Halides.
Citation
TANVEER AHMAD WANI, PANKAJA SINGH, Van der Waals contribution to the lattice potential in alkali halides, Optoelectronics and Advanced Materials - Rapid Communications, 7, 9-10, September-October 2013, pp.751-753 (2013).
Submitted at: Feb. 8, 2013
Accepted at: Sept. 18, 2013