Examples of fits to the data of plastic ice VII (P, 5.5 GPa; T, 518 K) using the three Lorentzians in equations (9), (10) and (11), coloured areas represent the fitted Lorentzians. The relative intensities and widths of the three contributions are constrained to the model, the intensity factor at each Q value is left as a free parameter. Error bars were calculated by the square root of absolute neutron count combined with the law of propagation of errors.
