Initially, fitting of the blend samples yielded reasonable R 2 values of 0.985 and 0.963 (i.e., close to 1) for the 1:1 and 1:6 blends respectively (Table ). The residuals from these fits are mostly flat except for a key feature at 3.22 and 3.25 Å for the 1:1 and 1:6 samples, respectively (Figure ). This peak is not present in either starting material or the empty capillary used for data correction and could represent an atom-atom correlation at the interface between the inorganic and MOF glasses.