The crystallization of an AlPO4-11 molecular sieve from various aluminum sources, namely, boehmite, pseudoboehmite, and aluminum isopropoxide, has been studied in this work. It has been found that the reactivity of the precursor affects the phase composition of the initial aluminophosphate gels and products of their subsequent crystallization as well as the morphology of the crystals of AlPO4-11 and characteristics of their porous structure.