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Published in Soil Sci Soc Am J 16:45-48 (1952)
© 1952 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Formation of Mixed Layer Minerals by Potassium Fixation in Montmorillonite1

R. S. Dyal and S. B. Hendricks2

ABSTRACT

The amount of ethylene glycol retained by a clay is used as an index of interlayer swelling. Potassium montmorillonites after drying at 100° C show markedly lower glycol retention than do calcium and hydrogen montmorillonites. X-ray diffraction data indicate that these potassium clays are in part unsolvated between silicate layers, and in part solvated with two layers of ethylene glycol.

NOTES

1 Contribution from the Division of Soil Management and Irrigation, B.P.I.S.A.E., A.R.A., U.S.D.A., Beltsville, Md. Received for publication October 12, 1951.

2 Soil Scientist and Chemist, respectively.






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