Figure 5
Observed and calculated neutron diffraction pattern (D2B, Å) at room temperature compared with the low-temperature powder profile. (1) Calculated pattern refined as a single monoclinic phase at room temperature (red); (2) observed pattern at room temperature (blue); (3) observed powder pattern in rhombohedral phase at 250 K (green). The arrows show the peaks that do not fit well in the red and blue patterns, while could be treated as the effect of the existence of the green one. |