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The synthesis and crystal structure of the novel aluminium diphosphonate Al2O3PC2H4PO3(H2O)2F2·H2O is described; the material consists of chains of AlO4F2 octahedra linked together by ethylenediphosphonate units to form a structure with channels running parallel to the a axis which contain extra-framework water molecules that can be desorbed.
Harvey et al. (Sat,) studied this question.