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Effects of Octahedral-Iron Reduction and Swelling Pressure on Interlayer Distances in Na-Nontronite

Published online by Cambridge University Press:  02 April 2024

Jun Wu ,
P. F. Low  and
C. B. Roth
Jun Wu*
Affiliation:
Department of Agronomy, Purdue University, West Lafayette, Indiana 47907
P. F. Low
Affiliation:
Department of Agronomy, Purdue University, West Lafayette, Indiana 47907
C. B. Roth
Affiliation:
Department of Agronomy, Purdue University, West Lafayette, Indiana 47907
*
2Permanent address: Institute of Soil Science, Academia Sinica, Nanking, People's Republic of China.
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Abstract

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A new type of environmental chamber for X-ray diffraction was designed that could sustain elevated, internal pressures of nitrogen or any other gas under oxygen-free conditions and that allowed the positions of the specimen and edge aperture to be adjusted by remote control. It was used to determine the values of the interlayer spacing, λ, of nontronite from Garfield, Washington, in different stages of reduction at different values of Π, the swelling pressure of the nontronite. At equilibrium, Π was equal to the pressure under which water was expressed from the clay. Both partially and fully expanded layers were found to exist in the reduced nontronite, the fraction of partially expanded layers increasing with increasing Π and Fe2+/Fe3+, the ratio of Fe2+ to Fe3+ in octahedral sites. Also, λ for the partially expanded layers was found to depend on Fe2+/Fe3+ but not on Π, and λ for the fully expanded layers was found to depend on Π but not on Fe2+/Fe3+. These findings were interpreted to mean that the reduction of Fe affected the short-range interlayer forces, but not the long-range ones.

Keywords

Interlayer distanceIronNontroniteReductionSwelling pressureX-ray powder diffraction
Type
Research Article
Information
Clays and Clay Minerals , Volume 37 , Issue 3 , June 1989 , pp. 211 - 218
Copyright
Copyright © 1989, The Clay Minerals Society

Footnotes

1

Journal paper 11,660, Purdue University Agricultural Station.

References

Chen, S. Z., Low, P. F. and Roth, C. B., 1987 Relation between potassium fixation and oxidation state of octahedral iron Soil Sci. Soc. Amer. J 51 82 – 86.CrossRefGoogle Scholar
Foster, M. D., 1953 Geochemical studies of clay minerals: II. Relation between ionic substitution and swelling in montmorillonites Amer. Mineral 38 994 – 1006.Google Scholar
Foster, W. R., Savins, J. G. and Waite, J. M., 1955 Lattice expansion and rheological behavior relationships in water-montmorillonite systems Clays and Clay Minerals, Proc. 3rd Natl. Conf., Houston, Texas, 1954 395 296 – 316.Google Scholar
Kittrick, J. A., 1960 Cholesterol as a standard in the X-ray diffraction of clay minerals Soil Sci. Soc. Amer. Proc 24 17 – 20.CrossRefGoogle Scholar
Kohyama, N., Shimoda, S. and Sudo, T., 1973 Iron-rich saponite (ferrous and ferric forms) Clays & Clay Minerals 21 229 – 237.CrossRefGoogle Scholar
Ravina, I. and Low, P. F., 1972 Relation between swelling, water properties and b-dimension in montmorillonite-water systems Clays & Clay Minerals 20 109 – 123.CrossRefGoogle Scholar
Ravina, I. and Low, P. F., 1977 Change of b-dimension with swelling of montmorillonite Clays & Clay Minerals 25 196 – 200.CrossRefGoogle Scholar
Reynolds, R. C., 1976 The Lorentz factor for basal reflections from micaceous minerals in oriented powder aggregates Amer. Mineral 61 484 – 491.Google Scholar
Rhoades, J. D., Ingvalson, R. D. and Stumpf, H. T., 1969 Interlayer spacing of expanded clay minerals at various swelling pressures: An X-ray diffraction technique for direct determination Soil Sci. Soc. Amer. Proc 33 473 – 475.CrossRefGoogle Scholar
Stucki, J. W., 1981 The quantitative assay of minerals for Fe2+ and Fe3+ using 1, 10-phenanthroline. II. A photochemical method Soil Sci. Soc. Amer. J 45 638 – 641.CrossRefGoogle Scholar
Stucki, J. W., Golden, D. C. and Roth, C. B., 1984 Preparation and handling of dithionite-reduced smectite suspensions Clays & Clay Minerals 32 191 – 197.CrossRefGoogle Scholar
Stucki, J. W., Golden, D.C. and Roth, C.B., 1984 Effects of reduction and reoxidation of structural iron on the surface charge and dissolution of dioctahedral smectites Clays & Clay Minerals 32 350 – 356.CrossRefGoogle Scholar
Stucki, J. W., Low, P. F., Roth, C. B. and Golden, D. C., 1984 Effects of oxidation state of octahedral iron on clay swelling Clays & Clay Minerals 32 357 – 362.CrossRefGoogle Scholar
Stucki, J. W., Komadel, P. and Wilkinson, H. T., 1987 Microbial reduction of structural iron(III) in smectites Soil Sci. Soc. Amer. J 51 1663 – 1665.CrossRefGoogle Scholar
Viani, B. V., Low, P. F. and Roth, C. B., 1983 Direct measurement of the relation between interlayer force and interlayer distance in the swelling of montmorillonite J. Colloid Interface Sci 96 229 – 244.CrossRefGoogle Scholar
Viani, B. V., Roth, C. B. and Low, P. F., 1985 Direct measurement of the relation between swelling pressure and interlayer distance in Li-vermiculite Clays & Clay Minerals 33 244 – 250.CrossRefGoogle Scholar
Wu, J., Roth, C. B. and Low, P. F., 1988 Biological reduction of structural iron in Na-nontronite Soil Sci. Soc. Amer. J 52 295 – 296.CrossRefGoogle Scholar