Main paper Figure 4 data: 
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The 8 filenames below correspond to the panels of Fig.4 in the main paper. 
There are 7 diffraction maps in (a)-(f) and (h), and an intensity scan in (g).

(a) aLi2IrO3_S1_hk0.dat				Sample 1 data, hk0 plane
(b) aLi2IrO3_S1_0kl.dat				Sample 1 data, 0kl plane
(c) aLi2IrO3_S2_0kl.dat				Sample 2 data, 0kl plane
(d) aLi2IrO3_S3_0kl.dat				Sample 3 data, 0kl plane
(e) aLi2IrO3_sim_hk0.dat			simulation, hk0 plane
(f) aLi2IrO3_sim_0kl.dat			simulation, 0kl plane
(g) aLi2IrO3_cross_section.dat		cross sections for samples 1 and 2, along k=2
(h) aLi2IrO3_sim_0kl_S3_twins.dat	simulation including twins to approximate Sample 3, 0kl plane

The 7 diffraction data files list every pixel in the colormaps in the paper according to two reciprocal space indices 
and an intensity. The format of the files is [varying_index_1   varying_index_2   intensity]; the fixed index is clear
from the filename. For example, in '*_0kl.dat' the format is [k   l   intensity]; all points listed are at h=0. 

Simulations are based on the structure given by O'Malley et al. (Ref. 22 in main text): 
O’Malley, M. J., Verweij, H. & Woodward, P. M. Structure and properties of ordered Li2IrO3 and Li2PtO3.
J. Solid State Chem. 181, 1803–1809 (2008).

In the diffraction colour maps the intensity I is plotted on a log scale, as log_2(1+I/255).

Note that the data in (g) may be obtained from the data in (b) and (c), by numerical integration between k=1.9 and k=2.1,
along the l (c*) direction, subtraction of the integrated neighbouring 1.7 < k < 1.9 region, and normalisation to the area
under the line.

Supplementary figure 5 data: 
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6-column ASCII file alpha_Li2IrO3_hkl_Fobs_vs_Fcalc.dat contains the structural refinement information 
H, K, L, |F_calc|^2, |F_obs|^2, |F_obs|^2_error  
where |F_obs|^2 are the integrated Bragg peak intensity values with an overall arbitrary scale factor and 
(H,K,L) are in rlu units of the monoclinic C2/m cell.  
