HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Francis, C. W. Articles by Amburgey, J. W. Search for Related Content PubMed Articles by Francis, C. W. Articles by Amburgey, J. W., Jr. Agricola Articles by Francis, C. W. Articles by Amburgey, J. W.

Separation of Clay Minerals and Soil Clays Using Isopycnic Zonal Centrifugation¹

ABSTRACT

The technique of isopycnic-zonal centrifugation in a continuous nonaqueous density gradient was used in the purification and separation of standard clay minerals and soil clays. A suspending agent (polyvinylpyrrolidone) compatible with tetrabromoethane and ethanol stabilized clay suspensions produced multiple banding of systems which otherwise flocculated into one band. Data from x-ray diffraction analyses revealed the technique is useful in purification of clay minerals and identification of clay minerals in soil clays; however the banding obtained from the clay fraction of a Dodge silt loam did not represent discrete bands of specific clay minerals.

¹ Research sponsored by the US Atomic Energy Commission under contract with the Union Carbide Corporation.

² Scientists, Oak Ridge National Laboratory, and Development Engineer, Oak Ridge Gaseous Diffusion Plant, respectively.