Figure 3
A selected region of the TOF neutron powder diffraction patterns at 400 K and at 4.2 K, showing the Rietveld fits to the observed patterns, including observed, calculated and difference curves, and reflection markers. Note that only the lower d-spacing range is shown in order to emphasize the presence of the superstructure reflections at 4.2 K. Thus the maximum intensity scale is only roughly 25% of what it would be if the patterns were shown to full scale. |