Skip to main content Accessibility help
×
Home

De-intercalated kaolinites: The nature of created defects and estimation of structural characteristics by the expert system of Plançon and Zacharie

  • M. A. Plastinina (a1), Ju. G. Fedorenko (a1) and A. A. Shpigun (a1)

Abstract

Initial and de-intercalated (by washing with water from formamide molecules) kaolinite was investigated by X-ray and IR spectroscopic methods. As a result of de-intercalation by water washing, changes in structural characteristics and in some physical-chemical properties of kaolinites take place: (1) the content of low-defect phase (%ldp) evaluated by the expert system of Plançon & Zacharie (1990) decreases; (2) the degree of order of the structure as determined by the Hinckley index decreases; (3) the size of coherent scattering regions (CSR) determined by the method of fourth moments decrease; (4) the rate of repeated introduction of the formamide molecules to the interlayer increases. The cause of these changes are water molecules introduced into the kaolinite interlayer as a result of de-intercalation. These water molecules have IR absorption bands at 3646 (v as), 3550 (v s) and 1650 (v α) cm-1. The results obtained are discussed in relation to modern ideas on disorder models of kaolinite crystals.

Copyright

References

Hide All
Barrios, J., Plançon, A., Cruz, M.I. & Tchoubar, C. (1977) Qualitative and quantitative study of stacking faults in a hydrazine treated kaolinite—relationship with infrared spectra. Clays Clay Miner. 25, 422429.
Bookin, A.S., Drits, V.A., Plançon, A. & Tchoubar, C. (1989) Stacking faults in kaolin-group minerals in the light of real structural feature. Clays Clay Miner. 37, 29%307.
Brindley, G.W. (1980) Order-disorder in clay mineral structures. Pp. 125-195 in: Crystal Structures of Clay Minerals and their X-ray Identification. (G.W. Brindley & G. Brown, Editors). Mineralogical Society, London.
Brindley, G.W. & Robinson, K. (1946) Randomness in the structures of kaolinitic clay minerals. Trans. Faraday Soc., 42B, 198205.
Costanzo, P.M. & Giese, R.F. (1990) Ordered and disordered organic intercalates of 8.4 Å , Synthetically hydrated kaolinite. Clays Clay Miner. 38, 160170.
Costanzo, P.M., Giese, R.F. & Lipsicas, M. (1984) Static and dynamic structure of water in hydrated kaolinites. I The static structure. Clays Clay Miner. 32, 419428.
Dymtchenko, N.P., Schischliannikova, L.M. & Yaroslavtseva, N.N. (1974) The use of ECM for calculations of parameters of fine crystal structure of polycrystals by the method of second and fourth moments. Pp. 37-45 in: Devices and Methods of X-ray Analysis. Mashinostroyenie, Leningrad. Ser. XV. (in Russian).
Hinckley, D.N. (1963) Variability in “crystallinity” Values among the kaolinite deposits of the coastal plain of Georgia and South Carolina. Clays Clay Miner. 11, 229235.
Ledoux, R. & White, J. (1964) Infrared study of selective deuteration of kaolinite and halloysite at room temperature. Science 145, 4749.
Murray, H.H. (1954) Structural variations of some kaolinites in relation to dehydrated halloysite. Am. Miner. 39, 97108.
Plançon, A. & Tchoubar, C. (1977) Determination of structural defects in phyllosilicates by X-ray diffraction. II. Nature and proportion of defects in natural kaolinites. Clays Clay Miner. 25, 436–450.
Plançon, A. & Zacharie, C. (1990) An expert system for the structural characterization of kaolinites. Clay Miner. 25, 249260.
Plançon, A., Giese, R.F. & Snyder, R. (1988) The Hinckley index for kaolinite. Clay Miner. 23, 249260.
Plançon, A., Gmse, R.F., Snvder, R., Drits, V.A. & Bookin, A.S. (1989) Stacking faults in the kaolin-group minerals: defect structures of kaolinite. Clays Clay Miner. 37, 203210.
Plastinina, M.A., Shpigoun, A.A., Fedorenko, JU. & Kadoshnikov, V.M. (1989) De-intercalated kaolinites, The nature of change of their structural order and some physical-chemical characteristics. Miner. J. 11, 5260 (in Russian).
Rouxhet, P.C., Samudacheata, Ngo, Jacobs, H. & Anton, O. (1977) Attribution of the OH stretching bands of kaolinite. Clay Miner. 12, 171178.
Wada, K. (1961) Lattice expansion of kaolin minerals by treatment with potassium acetate. Am. Miner. 46,78-91.

De-intercalated kaolinites: The nature of created defects and estimation of structural characteristics by the expert system of Plançon and Zacharie

  • M. A. Plastinina (a1), Ju. G. Fedorenko (a1) and A. A. Shpigun (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed