Hydrothermal synthesis and characterization of new aluminophosphates with AlPO₄-15 framework: A_1.5[Al₂P₂O_8.5(OH)_0.5(H₂O)]· xH₂O (A = K or Rb) †

Abstract

Two new isostructural aluminophosphates, A_1.5[Al₂P₂O_8.5(OH)_0.5(H₂O)]·xH₂O (A = K or Rb) have been synthesized hydrothermally and characterized by powder X-ray diffraction, infrared and solid state NMR spectroscopy and thermal analysis. The structure of the potassium compound has been determined by single crystal X-ray diffraction. The structure of its three-dimensional anionic framework is similar to that of AlPO₄-15 with intersecting tunnels occupied by A⁺ ions and water of crystallization.

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