Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
X-ray diffraction analyses of clay size fraction from Shovelers Sink soil showing illite–smectite (I/S) as dominant mineral. Small amounts of illite (I), kaolinite (Ka), and quartz (Qz) also exist. The 13.6-Å [I/S (001)] peak in the untreated sample expanded to 15.2 Å by ethylene glycol treatment, and collapsed to 9.9 Å by heat treatment. The 7.2-Å [kaolinite (001)] and 3.6-A [kaolinite (002)] peaks in the untreated sample disappeared by heating at 550°C.
