Extended Data Fig. 10: X-ray CD data.
a, [100]pc//[001]o in the scattering plane. b, [010]pc//[−110]o in the scattering plane. The first row presents the sum of the dichroic signal, (I+ + I−)/2, in which I± refers to the measured intensity for opposite helicities of the incoming light and the second row shows the CD signal, (I+ − I−)/(I+ + I−), and its behaviour on 180° rotation of the sample. The third panel shows the dichroic signal, (CDϕ1 − CDϕ2)/2, associated with a rotation of the sample by 180°, demonstrating a weak signal at the ± satellites in a, which is absent in b. In c and d, we show the dichroism under sample rotation when [100]pc//[001]o is in the scattering plane (c) and when the [010]pc//[−110]o direction is in the scattering plane (d). The upper panels of c and d plot the data from the two satellites onto a common axis, with the lower panels showing their average.
