Critical Opalescence of a Binary Liquid Mixture, n-Decane—β,β′-Dichloroethyl Ether. II. Small-Angle X-Ray Scattering

The small-angle x-ray scattering of n-decane and β,β′-dichloroethyl ether has been investigated at the critical-solution concentration over a range of temperatures near the phase-separation temperature in the one-phase region. Composite light- and x-ray scattering curves were constructed. The angular distribution of the scattering was analysed in terms of the Debye theory of critical opalescence. Deviations from the straight-line behavior in plots of reciprocal scattered intensity versus (s/λ)2(s=2 sin½θ, and λ is the wavelength in the medium) were observed.