Crystallization field of zeolite T at 100 °C for a SiO2/Al2O3 ratio of 28 and crystallization sequences in the Na2O–K2O–SiO2–Al2O3–H2O system

Abstract

A crystallization field of zeolite T has been found at n= 28 which differs in area and shape from those with lower values of n. Crystallization has been found to be very sensitive to changes in the ratio of OH to SiO₂ in the reaction mixture. Crystallization sequences of zeolite phases, depending on the composition of the reaction mixture, have been plotted and the disproportionation phenomenon has been observed.