Solvothermal synthesis and structural relations among three anionic aluminophosphates; catalytic behaviour
Abstract
Three microporous aluminophospates with Al/P ratios of 1 ∶ 1, 2 ∶ 3, and 1 ∶ 2 have been solvothermally synthesized. (NH4)2 −
x(H3O)xAl2(PO4)2(OH)2
(I) and (NH4)3Al2(PO4)3
(II) have 3D structures and exhibit nets of three-dimensional intersecting channels: (NH4)3Al(PO4)2
(III) is a very open layered material with 12R windows. Ammonium