@property<EOL><INDENT>def Zl(self):<DEDENT>
Vml = self.Vml<EOL>if Vml:<EOL><INDENT>return Z(self.T, self.P, Vml)<EOL><DEDENT>return None<EOL>
r'''Compressibility factor of the mixture in the liquid phase at the
        current temperature, pressure, and composition, [dimensionless].

        Utilizes the object oriented interface and
        :obj:`thermo.volume.VolumeLiquidMixture` to perform the actual
        calculation of molar volume.

        Examples
        --------
        >>> Mixture(['water'], ws=[1]).Zl
        0.0007385375470263454