Figure 2

3D renders of the as-received samples after exposure to water vapour. The contrast in density between uranium and UO₂ permitted rendering of the two materials separately, thus the 3D renders of each sample are displayed in pairs. The images in blue show the residual uranium metal (right) and yellow or orange represents UO₂ (left). The XRT quality between the two beam times changed dramatically and to show this, 3D renders in yellow are from using higher energies (115.6 keV) and orange from the lower energy (113.3 keV). Generally, edge artefacts, instrumental artefacts and absorption by the uranium prevented clean and sharp 3D renders for the higher energy beam time.