Optical microscopy shows clear differences between the pellets pre (Figure ) and post heat treatment. Optical images after heat treatment showed flow between the two materials in some regions in the samples (Figure ). Furthermore, sample homogeneity was investigated by SEM analysis and EDS mapping. When compared to the 1:1 physical mixture (Figure ), flow of the two glasses is evident in the 1:1 blend. SEM images of the blends show relatively smooth, homogenous surfaces, with several artefacts present on these surfaces (Figure ). EDS mapping identifies individual domains of the agZIF-62 and inorganic Importantly, cross-sectional images of the sample indicate an exposed core when the image is sliced, with the shell above and below (Figure ). This suggests the presence of a particle with both phases in close contact, instead of separate inorganic and MOF glass particles lying on top of each other. Overall, close mixing of the two components is evident.