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metal-organic compounds
The title one-dimensionally extended chain aluminophosphate, ethylenediammonium bis(propane-1,3-diyldiammonium) dialuminium tetraphosphate, [NH3(CH2)2NH3][NH3(CH2)3NH3]2[Al2P4O16], contains infinite [AlP2O8]3- chains composed of AlO4 and PO2(=O)2 tetrahedra, held together via hydrogen bonds by two kinds of protonated amines.