Preparation and Characterization of an 8.4 Å Hydrate of Kaolinite

Jim Tunney and Christian Detellier
Ottawa-Carleton Chemistry Institute Department of Chemistry, University of Ottawa Ottawa, Ontario, Canada K1N 6N5

Abstract: A stable 8.4 Å hydrate of kaolinite was prepared by exchanging ethylene glycol for water in the 10.8 Å intercalate of ethylene glycol in kaolinite. The hydrate of kaolinite was characterized by XRD, FTIR and TGA/DSC. From the TGA data, one can estimate that there is 0.60 water molecule per Al2Si2O5(OH)4 units. The IR data suggest a similarity of the local environment of the intercalated water in this 8.4 Å hydrate of kaolinite and the 8.4 Å hydrate of nacrite previously described by Wada (1965).

Key Words: Ethylene glycol • Hydrate of kaolinite • Intercalation • Kaolinite • Organo-clay

Clays and Clay Minerals; August 1994 v. 42; no. 4; p. 473-476; DOI: 10.1346/CCMN.1994.0420414
© 1994, The Clay Minerals Society
Clay Minerals Society (www.clays.org)