Get a dictionary the nuclear electric quadrupole moment in units of
        e*millibarns for various isotopes

def nmr_quadrupole_moment(self):
        """
        Get a dictionary the nuclear electric quadrupole moment in units of
        e*millibarns for various isotopes
        """
        return {k: FloatWithUnit(v, "mbarn")
                for k, v in self.data.get("NMR Quadrupole Moment", {}).items()}