Attached are CIF files for selected crystal structures found in this thesis. The following structures are completed, any other structures in this thesis that do not have CIF files attached are not complete data sets. The structures included are labelled in the thesis as follows: 1-Ce 1-Pr 1-Nd 1-Eu 1-Gd 2-Tb 3-Sm MIL-53 (Sc) EDB - HCl MIL-88 (Sc) EDB - HCl