The Interaction of Argon with Sulfur Surfaces. Experimental and calculated variations of the adsorption potential with surface coverage

The adsorption potentials of argon on the (111), (001) and (110) planes of rhombic sulfur have been calculated for a total of 818 sites, using an intermolecular potential of the <i>Lennard-Jones</i> (6:12) type with the <i>Kirkwood-Müller</i> expression. Direct summation over the nearest 100-150 atoms of the solid was used. There is a good agreement between the experimental and the calculated values of the adsorption potential, as a function of the surface coverage.