The residual obtained from subtracting the calculated composite D(r) from the experimental D(r) will contain any contributions from interactions at composite interfaces. The calculated composite D(r)s fit to the experimental D(r)s well, evidenced by good correlation coefficients and maintaining a C value equal to zero (Figure , Table ). Their residuals have very similar features, albeit with different scales, to -PC3 (Figure ). This further indicates that these features might be related to the Ti•••O•••P correlation from the Ti-MOF-glass interface. A similar behaviour was observed in other MOF-IG composites containing ZIF-8 or ZIF-62, where Zn•••O•••P have been observed from PDF data analysis. These correlations also satisfy charge balance. Thanks to the use of kapton capillaries during the data collection, capillary subtraction was much improved and residual correlations from the capillary were not observed. This raises the probability of identifying weakly scattering potential correlations at the interface and the potential distortions of the coordination environments during composite fabrication.