The 31 known nets represented on more than one structure in the database are represented on Figure . With the exception of fel (originating from feldspars) and cag (occuring in variscite), they are all referenced in the database of zeolite frameworks of IZA-SC. This is expected since AlPOs are structurally close to zeolites, with the replacement of Si atoms by Al and P. Conversely, it shows that fel and cag may be nets underlying the structure of unreported zeolites, especially since both only have 4-coordinates vertices, corresponding to the T-atoms, and can be embedded to exhibit pores.