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The cohesive energy of the potassium halides has been calculated for different assumed form for the interaction potential energy. In the present paper the three-body force shell model (TBFSM) have been used for calculation of cohesive energy of KX (X=F, Cl, Br & I) crystal. The used model has found to posses some remarkable features. The nearest and next-nearest neighbour interactions as well as van der Waals interactions are taken into account to evaluate the cohesive energy that has given good agreement with experimental results. The value of cohesive energy already performed By Sharma  but some error has been found .So by use of present model we can out com from such error. In the present paper value of cohesive energy also compared with Sarkar & Sengupta  and with three-body potential by Basu & sengupta .The atomization energy also reported for potassium halides crystal by using the value of cohesive energy. The obtained results are found to be in close agreement with experimental result..
Cohesive energy, Atomization energy, Three body, Dipole-dipole interaction & van der waal interaction.
U. C. SRIVASTAVA, Study of cohesive energy for KX(X=F, Cl, Br & I) crystal structure, Optoelectronics and Advanced Materials - Rapid Communications, 7, 9-10, September-October 2013, pp.698-701 (2013).
Submitted at: Nov. 26, 2012
Accepted at: Sept. 18, 2013