Figure 5
(Left) Reconstruction of the (h0l)* reciprocal lattice plane, based on the leucophoenicite diffraction data collected at the Xpress beamline at 0.16 GPa. The dashed arrows point to rows with h = 2n + 1, expected to be systematically absent for the P21/a space group. (Right) Reconstruction of the (h1l)* reciprocal lattice plane, based on the same experimental diffraction data previously described, showing the extra-peaks due to the (001) twinning (for an ease of clarity only few extra-peaks have been encircled) and the streaked reflections along the c* axis. |