Analysis of crystal binding of ammonium halides |
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Authors: | SC Agrawal VK Jain Jai Shanker |
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Institution: | Physics Department, C.L. Jain College, Firozabad-283203, Agra, India;Physics Department, Agra College, Agra-282002, India |
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Abstract: | Electronic polarizabilities and sizes of ions in NH4Cl, NH4Br and NH4I crystals are calculated using Ruffa's theory and an empirical relation between polarizability and radius. Using the electronic polarizabilities we have estimated the van der Waals dipole-dipole and dipole-quadrupole potentials following the Slater-Kirkwood varitional method. These potentials and ionic radii are then used to calculate the cohesive energies of ammonium halides. The results are discussed and compared with those of other investigators. |
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