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Thermal Behaviour of Kaolinite Intercalated with Formamide, Dimethyl Sulphoxide and Hydrazine |
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| Authors: | J. Kristóf R. L. Frost J. T. Kloprogge E. Horváth M. Gábor |
| Affiliation: | 1. Department of Analytical Chemistry, University of Veszprém, H-8201, Veszprém, P.O. Box 158, Hungary 2. Centre for Instrumental and Developmental Chemistry, Queensland University of Technology, 2 George Street, G.P.O. Box 2434, Brisbane, Q 4001, Australia 3. Research Group for Analytical Chemistry, Hungarian Academy of Sciences, H-8201, Veszprém, P.O. Box 158 4. Institute of Inorganic and Analytical Chemistry, E?tv?s L. University, H-1518, Budapest, P.O. Box 32, Hungary |
| Abstract: | The thermal behaviour of kaolinites intercalated with formamide, dimethyl sulphoxide and hydrazine has been studied by simultaneous TG-DTG-DTA-EGA and TG-MS techniques. The complexes can be decomposed completely without dehydroxylating the mineral. It was found that the amount of intercalated guest molecules per inner surface OH-group is close to unity for the formamide and dimethyl sulphoxide intercalates. For the intercalation of hydrazine it was found that hydrazine is locked in the expanded mineral as hydrazine hydrate and its amount is somewhat higher than that obtained for the other two reagents. The thermal evolution patterns of the guest molecules revealed that all the three reagents are bonded at least in two different ways in the interlayer space. This revised version was published online in August 2006 with corrections to the Cover Date. |
| Keywords: | evolved gas analysis intercalation kaolinite TG-DTG-DTA X-ray powder diffraction |
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