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Figure 4
Data representation based on 31 000 diffraction images, showing the evolution of sample compression including NaCl, Pt and MgO. (a) A heatmap representing the data with indication of the individual diffraction lines. The pressure at the start of oscillations in this experiment was around 5 GPa, with pressure cycling amplitudes estimated as 0.5–1 GPa. The pressure oscillations are most clearly observed in the NaCl diffraction lines. A slight increase in pressure, on top of the pressure oscillations, is observed throughout the experiment, and this should be attributed to a deformation of the DAC gasket material yielding to the conditions of cycling stress. (b) A magnification of selected 2θ ranges to illustrate the cycling of reflection positions between images 1000–2000. (Image provided by Biao Wang, University of Oxford.)

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 57| Part 4| August 2024| Pages 1217-1228
https://doi.org/10.1107/S1600576724004114
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