Aluminophosphate molecular sieves comprised of hydrated triple crankshaft chains

Abstract

We report the first synthesis of pure aluminophosphate hydrate H2 (AlPO₄-H2) and its structure; AlPO₄-H2 is constructed exclusively from a hydrated chain building unit that also builds the 18-ring VPI-5 structure and has one-dimensional channels circumscribed by highly elliptical rings consisting often oxygen atoms, implications from the existence of this building unit for the synthesis of novel aluminophosphate molecular sieves and for the synthesis of aluminosilicate and silicate analogues of AlPO₄-H2 and VPI-5 are discussed.