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

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

        Examples
        --------
        >>> Chemical('palladium').Z
        0.00036248477437931853