The first synthetic analogue of the rare natural zeolite brewsterite h
as been synthesized and named CIT-4. CIT-4 crystallizes with a composi
tion SrO:Al2O3:5.8-6 SiO2:4.5 H2O and is prepared via hydrothermal alt
eration of zeolite P1 by strontium-containing solutions and in the pre
sence of seed crystals of brewsterite. (C) 1997 Elsevier Science B.V.