Accession Number : AD0770920

Title :   Visible and Near Infrared Absorption Coefficients of Kaolinite and Related Clays.

Descriptive Note : Research and development technical rept.,


Personal Author(s) : Lindberg,James D. ; Smith,Michael S.

Report Date : NOV 1973

Pagination or Media Count : 20

Abstract : TRA, Kaolinite, ReflectanceHalloysite, DickiteClay minerals, by their very nature, are always composed of aggregates of fine particles, a situation which makes conventional transmission spectroscopy and application of the Bouguer-Lambert law difficult, because of the intense scattering of light in the sample. For this reason only qualitative information about the absorption spectra of such minerals is available. Although such spectra are very useful in studies of the structure of minerals, more quantitative absorption information is needed to assess the effect of clay particles on the propagation of light. This work is intended to provide a quantitative estimate of the absorption coefficient of kaolinite clays by application of a method based on the Kubelka-Munk theory of diffuse reflectance.

Descriptors :   *Clay minerals, *Absorption spectra, Kaolinite, Reflectance

Subject Categories : Inorganic Chemistry
      Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE