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Thermal diffusivity of CO2 along the critical isochore close to the critical temperature from the Rayleigh scattering line width from Swinney and Henry128 (△) and the transient interferometry measurements of Becker and Grigull52 (●). Solid curve is from the correlation for thermal conductivity described here with thermodynamic properties from the Albright et al. 127 equation of state. Dashed curve is based on properties from the Span and Wagner114 equation of state.
