Figure 4.

Size distributions of the cores of the primary particles of p₃ and p₄ (green and black lines) in number-weighted and volume-weighted form [(a) and (b), respectively]. Displayed are the partial differential functions (solid lines) and cumulative distribution functions (dashed lines). The number-weighted distributions are given in units of particles per cm³. The volume-weighted size distributions in (b) are given in units of iron content in mg per ml, calculated on the basis of an Fe₂O₃ stoichiometry.