UoB-100(Dy) was prepared as yellow hexagonal crystals from the reaction of Dy(NO3)3.6H2O with L in N,N'dimethylformamide using 2-fluorobenzoic acid as a modulator (see S.I. for details). SCXRD date was collected at a range of temperatures (100-300K) and with either Cu-Kα or Mo-Kα radiation to ensure the best quality data for either diffuse reflectance or Bragg diffraction. As a result data collected at 100K (Cu-Kα radiation) was used for diffuse scattering studies and data collected at 250K (Mo-Kα radiation) for average structure refinement (see S.I. for details). The structure of UoB-100(Dy) comprises Dy-based secondary building units (SBUs) bridged by twelve tetracarboxylate linkers, L. The framework formed by UoB-100(Dy) contains Dy9 SBUs that have been observed for other rare-earth (RE) MOFs with both tetracarboxylate and tricarboxylate linkers. Previous examples of MOFs containing the RE9 SBU have all been prepared using rigid linkers with little opportunity for alternative conformations. Even so, disorder of the SBU has been observed but no previous understanding of the correlation of the disorder has been proposed.