@property<EOL><INDENT>def sigmas(self):<DEDENT>
return [i.sigma for i in self.Chemicals]<EOL>
r'''Pure component surface tensions of the chemicals in the mixture at
        its current temperature, in units of [N/m].

        Examples
        --------
        >>> Mixture(['benzene', 'toluene'], ws=[0.5, 0.5], T=320).sigmas
        [0.02533469712937521, 0.025254723406585546]