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The second dielectric virial coefficients of CH4 and CF4 are calculated by only taking into account the dipole-induced dipole contribution for the distortion part and the octupolar and hexadecapolar fields for the orientation part. The resulting values are consistent with experiment. The contribution of the electronic correlation and exchange effects to the collision induced polarization is discussed.
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Isnard et al. (1980) studied this question.
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