Some observations on forms of NaA and NaX zeolites growing in the presence of triethanolamine

Abstract

Abstract Using modified preparation conditions for silicate and aluminate solutions some differences in the result of large A‐ and X‐type zeolites crystallization utilizing Charnell's procedure have been obtained. A‐type zeolite crystals show clearly {110} faces. X‐type zeolite occurs in mixed phase together with A‐type zeolite as separate as well as overgrown crystals. These observations can be explained by structure defects in A‐type crystals and by presence of polysilicate or/and too high aluminium content in the gel.