Hostname: page-component-5c6d5d7d68-tdptf Total loading time: 0 Render date: 2024-08-09T13:40:58.226Z Has data issue: false hasContentIssue false
  • English
  • Français

The montmorillonite differential thermal curve. II. Effect of exchangeable cations on the dehydroxylation of normal montmorillonite

Published online by Cambridge University Press:  14 March 2018

R. C. Mackenzie  and
B. M. Bishui
R. C. Mackenzie
Affiliation:
The Macaulay Institute for Soil Research, Aberdeen
B. M. Bishui
Affiliation:
The Macaulay Institute for Soil Research, Aberdeen
Get access

Abstract

Examination of the differential thermal characteristics of a normal montmorillonite saturated with a series of monovalent and divalent cations shows that the temperature of the main dehydroxylation peak is independent of valency but is apparently a parabolic function of ionic radius. NH4+, Cs+, Zn2+ and Cd2+ give anomalous results, but the apparent discrepancy of the former two ions can be fully accounted for. The results are believed to be consistent with evolution of water molecules through the hexagonal holes in the sheet surface and diffusion between the layers to the micelle edge. The significance of variation in the 800–1000°C region of the curve is briefly considered.

Type
Research Article
Information
Clay Minerals Bulletin , Volume 3 , Issue 20 , December 1958 , pp. 276 - 286
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1958

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Ahrens, L. H. 1952. Geochim. et cosmoch. Acta, 2, 155-169.Google Scholar
Barshad, I. 1950. Amer. Min., 35, 225-238.Google Scholar
Bower, C. A. and Truog, E., 1940. Proe. Soil Sci. Soc. Amer., 5, 86-89.Google Scholar
Earley, J. W. Milne, J. H. and McVeagh, W. J. 1953. Amer. Min., 38,770-783.Google Scholar
Evans, R. C. 1948. An Introduction to Crystal Chemistry. Cambridge University Press.Google Scholar
Greene-Kelly, R. 1957. The Differential ThermalInvestigation of Clays. (Mackenzie, R. C., editor). Mineralogical Society, London. Chapter V, pp. 140-164.Google Scholar
Goldschmidt, V. M. 1946. Nature, Lond., 157, 192.Google Scholar
Hendricks, S. B., Nelson, R. A. and Alexander, L. T. 1940. J. Amer. Chem. Soc., 62, 1457-1464.Google Scholar
Jonas, E. C. and Grim, R. E. 1957. The Differential Thermal Investigation of Clays. (Mackenzie, R. C., editor). Mineralogical Society, London. Chapter XV, pp. 389-403.Google Scholar
McConnell, D. 1950. Amer. Min., 35, 166-172.Google Scholar
McConnell, D. 1951. Clay Min. Bull.,1, 179-188.Google Scholar
Mackenzie, R. C. 1952. An. Edafol. Fisiol. veg., 11, 159-184.Google Scholar
Mackenzie, R. C. 1957. Bull. Groupe franç. Argiles, 9, 7-15.Google Scholar
Nuss, M. L. and Wey, R. 1956. Bull. Groupe franç Argiles, 7, 15-19.Google Scholar
Overbeek, J. Th. G. 1952. Colloid Science. (Kruyt, H. R., editor). Elsevier, Amsterdam, 1, 267.Google Scholar