Mass versus diameter for the clumps detected in the ¹³CO(3−2) line. The filled circles represent type A clumps, the filled triangles show type B clumps, and the open circles plot the type C clumps. The open triangle indicates the clump associated with the MSFR IRAS 16562-3959. The arrows show the minimal detectable diameter and mass, ~0.2 pc and ~0.1 M_⊙. The dotted lines indicate mean densities at 10², 10³, and 10⁴ cm^-3.