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A new layered aluminophosphate has been synthesized hydrothermally in the presence of 1,3-diaminopropane and its structure solved from X-ray powder diffraction data. The compound with the composition [C3H12N2]0.5[AlPO4(OH)(H2O)]·H2O crystallizes in the orthorhombic space group Pnma (No. 62) with a = 6.91848(11), b = 22.2989(4) and c = 9.6074(2) Å. The layers contain only 6-co-ordinated aluminium forming [–Al–(OH)–Al–] chains, and these are connected to one another via phosphorus tetrahedra. The structure of the layers is closely related to that of the layered aluminium methylphosphonate AlMepO-ζ. This compound represents the third example of layered aluminophosphates with an atomic ratio P∶Al = 1∶1. Its thermal decomposition has been monitored by X-ray diffraction and solid state NMR.
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Maeda et al. (2000) studied this question.
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