text: def copper_thermal_conductivity_CRC(T):
      """
      Copper thermal conductivity as a function of the temperature from [1].
  
      References
      ----------
      .. [1] William M. Haynes (Ed.). "CRC handbook of chemistry and physics". CRC Press
      (2014).
  
      Parameters
      ----------
      T: :class:`pybamm.Symbol`
         Dimensional temperature
  
      Returns
      -------
      :class:`pybamm.Symbol`
         Thermal conductivity
      """
  
      lambda_th = -5.409e-7 * T ** 3 + 7.054e-4 * T ** 2 - 0.3727 * T + 463.6
  
      return lambda_th
  