Figure 4

Laboratory X-ray tomography sections obtained at perpendicular orientations through the both central horizontal and vertical planes of two of the representative particulates from each suite; (a,b) CF-01-R024 (Unit 1), (c,d) CF-01-T18 (Unit 1) and (e,h) OH-06-07 (Unit 3), (g,h) OH-02-01 (Unit 3). Regions absent of voids within the representative Unit 1 particulates are red in (a)–(d). Scale bars = 100 µm.