Al16P20O80H4·4C6H18N2: A New Microporous Aluminophosphate Containing Intersecting 12- and 8-Membered Ring Channels

A new microporous aluminophosphate, designated AlPO-HDA, is prepared under solvothermal conditions using 1,6-hexanediamine as the template. AlPO-HDA is the first microporous aluminophosphate with Al/P ratio of 4/5. The structure is characterized by a series of double six-rings sharing 4-MR with each other stacked along the b direction. These columns of double six-rings interconnect through 4-MR to form layers that are further connected together through PO2(O)(OH) tetrahedra to build up the three-dimensional framework with intersecting 12-MR and 8-MR channels.