About Us | Help Videos | Contact Us | Subscriptions



This article in SSSAJ

  1. Vol. 45 No. 4, p. 815-818
    Received: Feb 13, 1980
    Accepted: Feb 17, 1981

Request Permissions


Halloysite and Kaolinite Cesium Chloride-Urea Intercalation Facilitated by a Trace of Water at Elevated Temperature1

  1. T. Higashi and
  2. M. L. Jackson2



Addition of 75 µliters of H2O to a mixture of 50 mg of partially hydrated spherical and tubular halloysite or coarse kaolinite and 250 mg of CsCl at 80°C for 48 hours followed by two washings with 10% urea solution produces a complete CsCl-urea intercalation at a 10.4–10.6å x-ray diffraction spacing. Washing with 10% urea solution enhanced the 10.4–10.6å peak by removal of the excess CsCl. Fireclay and fine kaolinites require 1–4 min of grinding in CsCl for complete expansion to 10.4–10.6Å spacing. As a result of 3 min of grinding, an additional 8–23% of SiO2 + Al2O3 is dissolved from such kaolinites during 2.5 min of boiling in 0.5N NaOH.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America