A study of Si, Al ordering and cation positions in the zeolites sodium ZK-4 and sodium Y by neutron diffraction

Abstract
Neutron diffraction measurements on the zeolites sodium ZK-4 (Si/Al = 1.65) and sodium Y (Si/Al = 2.61) show that there is no long range ordering of Si and Al, in contrast to results on sodium A and sodium X; the depopulation of the 8-ring sodium site in ZK-4 accounts for its ability to sorb linear hydrocarbons.

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