The microporous crystalline aluminophosphate designated AlPO-41 has be
en synthesized as a pure phase in a mixed water-alcohol system. This s
ynthesis of AlPO-41 avoids the previously reported need for seed cryst
als to obtain a pure AlPO-41 phase. AlPO-41 is also shown to undergo a
reversible phase change on exposure to water similar to that seen for
AlPO-11.