@property<EOL><INDENT>def alpha(self):<DEDENT>
return phase_select_property(phase=self.phase, l=self.alphal, g=self.alphag)<EOL>
r'''Thermal diffusivity of the mixture at its current temperature,
        pressure, and phase in units of [m^2/s].
        Available only if single phase.

        .. math::
            \alpha = \frac{k}{\rho Cp}

        Examples
        --------
        >>> Mixture(['furfural'], ws=[1]).alpha
        8.696537158635412e-08