Heteroaggregation may be desired or undesired in the fabrication of (nanoscale) particles, for example, when deposited from liquid or gaseous precursors: phase purity or incongruent condensation could both be target features, depending on the ultimate application. The more complex the selection of precursor materials and their possible reaction products, the more challenging will be the task of process optimization required for achieving the desired target material. In particular, processing conditions and indepth knowledge on product resilience to variations in certain processing parameters will be of crucial importance. The complexity of this problem calls for machine-aided optimization protocols, which require consistent datasets.