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X-Ray Powder Diffraction Studies on the Rehydration Properties of Beidellite

Published online by Cambridge University Press:  02 April 2024

Motoharu Kawano  and
Katsutoshi Tomita
Motoharu Kawano*
Affiliation:
Institute of Earth Sciences, Faculty of Science, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890, Japan
Katsutoshi Tomita
Affiliation:
Institute of Earth Sciences, Faculty of Science, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890, Japan
*
1Present address: Department of Environmental Sciences and Technology, Faculty of Agriculture, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890, Japan.
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Abstract

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The rehydration properties of Ca-, Mg-, Na-, and K-saturated homoionic beidellites after heating at various temperatures were compared with those of montmorillonites. The behavior of interlayer Na+ during dehydration and rehydration was also investigated by means of one-dimensional Fourier analysis. The K- and Mg-saturated specimens exhibited fast and slow rehydration rates, respectively, during exposure to air of 50% RH after heating at 800°C. These homoionic specimens showed strong rehydration properties on saturation with deionized water after heating <900°C for 1 hr. On the basis of Fourier analysis, the interlayer cations appeared to have migrated into the hexagonal holes of SiO4 network on thermal dehydration, and the migrated cations returned to the interlayer space on rehydration. This behavior of the interlayer cations appears to have been strongly dependent on value of the octahedral negative charge and on the sizes of interlayer cations. The small octahedral negative charge of beidellite produced a weaker attractive electrostatic force between the octahedral sheets and the migrated interlayer cations. Therefore, the migrated interlayer cations in beidellite were easily extracted from the hexagonal holes, and rehydration was rapid. The small cation migrated easily into hexagonal holes and was fixed to the holes. On the contrary, large cations were probably difficult to fix and were easily extracted from the hexagonal holes. Consequently, the rehydration rate of K-saturated beidellite was fast, and that of Mg-saturated beidellite was slow.

Keywords

BeidelliteCation migrationDehydrationFourier analysisInterlayer rationRehydrationX-ray powder diffraction
Type
Research Article
Information
Clays and Clay Minerals , Volume 39 , Issue 1 , February 1991 , pp. 77 - 83
Copyright
Copyright © 1991, The Clay Minerals Society

References

Ben Hadj-Amara, A., Besson, G. and Tochoubar, C., 1987 Charactéristiques structurales d’une smectite dioctahédrique en fonction de l’ordre-désordre dans la distribution des charges électriques: I. Etudes des reflections 001 Clay Miner. 22 205 – 318.CrossRefGoogle Scholar
Bradley, W. F. and Grim, R. E., 1951 High-temperature thermal effects of clay and related materials Amer. Mineral. 36 182 – 201.Google Scholar
Calvet, R. and Prost, R., 1971 Cation migration into empty octahedral sites and surface properties of clays Clays & Clay Minerals 19 175 – 186.CrossRefGoogle Scholar
Eberhart, L. P., 1963 Transformation du mica en muscovite par chauffage entre 700° et 1200°C Bull. Soc. Franc. Miner. Cristallogr. 86 213 – 251.Google Scholar
Glaeser, R. and Méring, J., 1967 Effet du chauffage sur les montmorillonites saturees de cations de petit rayon C.R. Acad. Sci. Paris 265 833 – 835.Google Scholar
Greene-Kelly, R., 1953 The identification of montmoril-lonoids in clays J. Soil Sci. 4 233 – 237.CrossRefGoogle Scholar
Greene-Kelly, R., 1955 Dehydration of the montmorillonite minerals Mineral. Mag. 30 604 – 615.Google Scholar
Greene-Kelly, R. and Mackenzie, R. C., 1957 The montmorillonite minerals The Differential Thermal Investigation of Clays London Mineralogical Society 140 – 164.Google Scholar
Grim, R. E. and Bradley, W. F., 1948 Rehydration and dehydration of the clay minerals Amer. Mineral. 33 50 – 59.Google Scholar
Hofmann, U. and Kiemen, R., 1950 Verlust der Austauschfahigkeit von Lithiumionen an Bentonit durch Erhitzung Z. Anorg. Allg. Chem. 262 95 – 99.CrossRefGoogle Scholar
Kawano, M. and Tomita, K., 1989 Rehydration properties of Na-rectorite from Makurazaki, Kagoshima Prefecture, Japan Miner. J. (Tokyo) 14 351 – 372.CrossRefGoogle Scholar
Kawano, M. and Tomita, K., 1989 X-ray studies of rehydration behaviors for montmorillonite Clay Sci. 7 277 – 287.Google Scholar
Komarov, V. S., Rozin, A. T. and Akulich, N. A., 1977 Sites of the localization of exchange cations of heat-treated montmorillonite Zh. Prikl. Spektrosk. 26 1099 – 1103.Google Scholar
Luca, V. and Cardile, C. M., 1988 Thermally induced cation migration in Na and Li montmorillonite Phys. Chem. Minerals 16 98 – 103.CrossRefGoogle Scholar
Luca, V. and Cardile, C. M., 1989 Cation migration in smectite minerals: Electron spin resonance of exchanged Fe3+ probes Clays & Clay Minerals 37 325 – 332.CrossRefGoogle Scholar
Matsuda, T., 1988 Beidellite from Sano mine, Nagano Prefecture, Japan Clay Sci. 7 151 – 159.Google Scholar
Matsuda, T., 1989 Expansion characteristics of rectorite Clay Sci. 7 297 – 306.Google Scholar
McBride, M. B., Mortland, M. M. and Pinnavaia, T. J., 1974 Exchange ion position in smectite: Effects on electron spin resonance of structural iron Clays & Clay Minerals 22 162 – 163.Google Scholar
Midgley, H. G. and Gross, K. A., 1956 Thermal reactions of smectites Clay Minerals Bull. 16 79 – 90.CrossRefGoogle Scholar
Pezerat, H. and Méring, J., 1967 Recherches sur la position des cations echangeables et de leau dans les montmorillonites C.R. Acad. Sci. Paris 265 529 – 532.Google Scholar
Reynolds, R. C., Brindley, G. W. and Brown, G., 1980 Interstratified clay minerals Crystal Structures of Clay Minerals and their X-ray Identification London Mineralogical Society 249 – 303.CrossRefGoogle Scholar
Rosseinsky, D. R., 1965 Electrode potentials and hydration energies. Theories and correlations Chemical Reviews 65 467 – 490.CrossRefGoogle Scholar
Suquet, H., de la Calle, C. and Pezerat, H., 1975 Swelling and structural organization of saponite Clays & Clay Minerals 23 1 – 9.CrossRefGoogle Scholar
Tettenhorst, R., 1962 Cation migration in montmorillonites Amer. Mineral. 47 769 – 773.Google Scholar
Udagawa, S., 1955 X-ray studies on thermal transformations in sericite J. Ceram. Assoc. Japan 63 517 – 523.CrossRefGoogle Scholar
Uno, Y., Kohyama, N., Sato, M. and Takeshi, H., 1986 High-temperature phase transformation of moritmorillonites J. Miner. Soc. Japan 17 155 – 161.Google Scholar
Wardle, R. and Brindley, G.W., 1972 The crystal structures of pyrophyllite, 1Tc, and of its dehydroxylate Amer. Mineral. 57 732 – 750.Google Scholar
Whittaker, E. J. W. and Muntus, R., 1970 Ionic radii for use in geochemistry Geochim. Cosmochim. Acta 34 945 – 956.CrossRefGoogle Scholar