Crossref journal-article
Cambridge University Press (CUP)
Clays and Clay Minerals (56)
Abstract

AbstractInteraction of water with montmorillonite exchanged with Na+, K+, Co2+, and Cu2+ cations as a function of water content was examined using an FTIR/gravimetric cell designed to collect spectroscopic and sorption data simultaneously. Correlation of water desorption isotherms with infrared spectra of the clay-water complex showed that the position of the HOH bending band of water decreased as a function of water content. The largest decreases in frequency were observed for Cu2+ and Co2+; smaller decreases were found for Na+ and K+. In addition, the molar absorptivity of sorbed water increased upon decreasing the water content. The decrease in frequency and the concomitant increase in molar absorptivity were attributed to polarization effects on the sorbed water molecules by exchangeable cations. The interference fringes of a self supporting clay film permitted d-spacings to be determined optically and, therefore, changes in frequency, molar absorptivity, and water sorption behavior to be related directly to changes in interlayer spacing. The d-spacings obtained from the interference fringes were consistently larger by approximately 0.5 Å than those determined using powder XRD.

Bibliography

Johnston, C. T., Sposito, G., & Erickson, C. (1992). Vibrational Probe Studies of Water Interactions with Montmorillonite. Clays and Clay Minerals, 40(6), 722–730.

Authors 3
  1. C. T. Johnston (first)
  2. G. Sposito (additional)
  3. C. Erickson (additional)
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Dates
Type When
Created 19 years ago (Aug. 25, 2006, 3:44 a.m.)
Deposited 3 weeks, 4 days ago (Aug. 13, 2025, 1:25 a.m.)
Indexed 3 weeks, 2 days ago (Aug. 14, 2025, 10:31 p.m.)
Issued 32 years, 9 months ago (Dec. 1, 1992)
Published 32 years, 9 months ago (Dec. 1, 1992)
Published Online 1 year, 6 months ago (Feb. 28, 2024)
Published Print 32 years, 9 months ago (Dec. 1, 1992)
Funders 0

None

@article{Johnston_1992, title={Vibrational Probe Studies of Water Interactions with Montmorillonite}, volume={40}, ISSN={1552-8367}, url={http://dx.doi.org/10.1346/ccmn.1992.0400611}, DOI={10.1346/ccmn.1992.0400611}, number={6}, journal={Clays and Clay Minerals}, publisher={Cambridge University Press (CUP)}, author={Johnston, C. T. and Sposito, G. and Erickson, C.}, year={1992}, month=dec, pages={722–730} }