Potential parameters and surface areas from third-order gas–solid interactions

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Abstract
Values of the effective interaction potential between a pair of adsorbed molecules are evaluated in terms of different potential models for argon adsorbed on two carbon surfaces. The resultant three-body (admolecule–admolecule–solid) energies are not in accord with independent theoretical predictions. It is suggested that the results may be indicative of a saturation phenomenon. The apparent areas of both powders are nearly independent of the assumed interaction model, a fact which lends weight to the quantitative significance of surface areas determined by this method.

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