Derivative dilatometric study of natural zeolites

This study concerns the expansion-shrinkage behavior of the following zeolites: natrolite, thomsonite, scolecite, heulandite, clinoptilolite, and stilbite. The analytical method used was derivative dilatometry. The use of dilatometric measurement provides a clearer representation of metaphase format...

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Bibliographic Details
Published in:Zeolites 1989-09, Vol.9 (5), p.412-417
Main Authors: Ullrich, B., Adolphi, P., Zwahr, H., Schomburg, J.
Format: Article
Language:English
Subjects:
Chemistry
dehydration
dilatometrical measurement
Exact sciences and technology
General and physical chemistry
Ion-exchange
metaphase formation
Surface physical chemistry
Zeolite
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Summary:This study concerns the expansion-shrinkage behavior of the following zeolites: natrolite, thomsonite, scolecite, heulandite, clinoptilolite, and stilbite. The analytical method used was derivative dilatometry. The use of dilatometric measurement provides a clearer representation of metaphase formation during the thermal dehydration of a zeolite. The dehydration of the minerals in the natrolite group can be described as expansive, whereas the dehydration of heulandite, clinoptilolite, and stilbite is characterized by contracting reactions. This contrasting behavior seems to be consistent with the varying qualities of the water bonding in the zeolite lattice.
ISSN:0144-2449
1873-3115
DOI:10.1016/0144-2449(89)90095-X