Besides the direct comparison with FPMD, the structure of liquid ammonia predicted by DPMD has also been compared with experimental measurements. The N-N partial structure factor of liquid ammonia at 277 K and 5 bar obtained by X-ray diffraction (points) and DPMD simulations (continuous line) is shown in Fig. . DPMD does predict the structure of liquid ammonia in agreement with experiment. The structure factor was computed using the equation