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Clays and Clay Minerals

, Volume 44, Issue 6, pp 825–834 | Cite as

Experimental Transformation of Kaolinite to Halloysite

  • Balbir Singh
  • Ian D. R. Mackinnon
Article

Abstract

A well-characterized kaolinite has been hydrated in order to test the hypothesis that platey kaolinite will roll upon hydration. Kaolinite hydrates are prepared by repeated intercalation of kaolinite with potassium acetate and subsequent washing with water. On hydration, kaolinite plates roll along the major crystallographic directions to form tubes identical to proper tubular halloysite. Most tubes are elongated along the b crystallographic axis, while some are elongated along the a axis. Overall, the tubes exhibit a range of crystallinity. Well-ordered examples show a 2-layer structure, while poorly ordered tubes show little or no 3-dimensional order. Cross-sectional views of the formed tubes show both smoothly curved layers and planar faces. These characteristics of the experimentally formed tubes are shared by natural halloysites. Therefore, it is proposed that planar kaolinite can transform to tubular halloysite.

Key Words

Halloysite Hydration Intercalation Kaolinite Rolling Tetrahedral Rotation 

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References

  1. Bailey SW. 1989. Halloysite—A critical assessment. In: Farmer VC, Tardy Y, editors. Proceedings of the International Clay Conference; Strasbourg, France. Sci Geol Mem 86:89–98.Google Scholar
  2. Bates TF, Hildebrand FA, Swineford A. 1950. Morphology and structure of endellite and halloysite. Am Mineral 6: 237–248.Google Scholar
  3. Churchman GJ, Aldridge LP, Carr RM. 1972. The relationship between the hydrated and dehydrated states of an halloysite. Clays Clay Miner 20:241–246.CrossRefGoogle Scholar
  4. Costanzo PM, Clemency CV, Giese RF, Jr. 1980. Low temperature synthesis of a 10-A hydrate of kaolinite using dimethylsulfoxide and ammonium fluoride. Clays Clay Miner 28:155–156.CrossRefGoogle Scholar
  5. Costanzo PM, Giese RF, Jr. 1985. Dehydration of synthetic hydrated kaolinites: a model for the dehydration of halloysite (10 Â). Clays Clay Miner 33:425-423.Google Scholar
  6. Costanzo PM, Giese RF, Jr, Clemency CV. 1984. Synthesis of a 10-Â hydrated kaolinite. Clays Clay Miner 32:29–35.CrossRefGoogle Scholar
  7. Deed CT, van Olphen H, Bradley WH. 1966. Intercalation and interlayer hydration of minerals of the kaolinite group. In: Heller L, Weiss A, editors. Proceedings of the International Clay Conference; 1966; Jerusalem, Israel; Vol. 1. Jerusalem: Programs of Science in Translation, p 183–199.Google Scholar
  8. Dixon JB, McKee TR. 1974. Internal and external morphology of tubular and spheroidal halloysite particles. Clays Clay Miner 22:127–137.CrossRefGoogle Scholar
  9. Giese RF, Jr. 1988. Kaolin minerals: structures and stabilities. Chapter 3. In: Bailey SW, editor. Hydrous phyllosilicates (exclusive of micas). MSA Rev Mineral 19:29–66.CrossRefGoogle Scholar
  10. Honjo G, Kitamura N, Mihama K. 1954. A study of clay minerals by means of single crystal electron diffraction diagrams—the structure of tubular kaolin. Clay Miner Bull 4:133–141.CrossRefGoogle Scholar
  11. Kohyama N, Fukushima K, Fukami A. 1978. Observation of the hydrated form of tubular halloysite by an electron microscope equipped with an environmental cell. Clays Clay Miner 26:25–40.CrossRefGoogle Scholar
  12. Mackinnon IDR, Uwins PJR, Yago AJE. 1993. Kaolinite particle sizes in the <2 μm range using laser scattering. Clays Clay Miner 41:613–623.CrossRefGoogle Scholar
  13. Radoslovich EW 1963. The cell dimensions and symmetry of layer-lattice silicate: VI. Serpentine and kaolin morphology. Am Mineral 48:368–378.Google Scholar
  14. Robertson IDM, Eggleton RA. 1991. Weathering of granitic muscovite to kaolinite and halloysite and of plagioclasederived kaolinite to halloysite. Clays Clay Miner 39:113–126.CrossRefGoogle Scholar
  15. Singh B. 1996. Why does halloysite roll?—A new model. Clays Clay Miner 44:191–196.CrossRefGoogle Scholar
  16. Singh B, Gilkes RJ. 1992. An electron-optical investigation of the alteration of kaolinite to halloysite. Clays Clay Miner 40:212–229.CrossRefGoogle Scholar
  17. Uwins PJR, Mackinnon IDR, Thompson JG, Yago AJE. 1993. Kaolinite: NMF intercalates. Clays Clay Miner 41: 707–717.CrossRefGoogle Scholar
  18. Wada K. 1961. Lattice expansion of kaolin minerals by treatment with potassium acetate. Am Mineral 46:78–91.Google Scholar
  19. Wada K. 1965. Intercalation of water in kaolin minerals. Am Mineral 50:924–941.Google Scholar
  20. Wolfe RW, Giese RF, Jr. 1978. The stability of fluorine analogues of kaolinite. Clays Clay Miner 26:76–78.CrossRefGoogle Scholar

Copyright information

© The Clay Minerals Society 1996

Authors and Affiliations

  • Balbir Singh
    • 1
  • Ian D. R. Mackinnon
    • 1
  1. 1.Centre for Microscopy and MicroanalysisThe University of QueenslandBrisbaneAustralia

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