Morphological diagrams for the clusters in our sample with available X-ray Chandra data: (a) c − w, (b) c − P₃/P₀, and (c) w − P₃/P₀. Vertical and horizontal dashed lines are adapted from Cassano et al. (2010a): c = 0.2, w = 0.012, and P₃/P₀ = 1.2 × 10⁻⁷. The red circles represent radio halos, black squares clusters without radio halos, and black triangles clusters with mini halos. The values of the parameters plotted here are listed in Paper I, Table 5. Clusters that are explicitly mentioned in the text are labelled in red.