INFLUENCE OF ASSOCIATED COMPONENTS OF KAOLIN ON THE DEGREE OF DISORDER OF KAOLINITE AS DETERMINED BY XRD

In: Geologica Carpathica Clays, vol. 3, no. 2

Emilio Galan - Patricia Aparicio - Isabel Gonzalez - Angel La Iglesia

Detaily:

Rok, strany: 1994, 59 - 75

O článku:

The determination of the structural order of kaolinite in mixtures of amorphous phases and minerals, has been performed by the application of a so-called "expert system" and by means of the calculation of the "crystallinity indices", determined from the corresponding X-ray diffraction diagrams. From the statistical study of the results obtained, it has been shown that the measure of the Stoch index is not affected by the presence of associated components like those studied (quartz, feldspar, iron hydroxide, silica and alumina gels), while this is not true for the Range & Weiss index in a general manner. For the other indices the reproducibility varies as a function of the crystallinity of the kaolinite and the components present and their particle- size distribution. In commercial kaolins, where the percentage of quartz varies between 5–10 % and the presence of iron hydroxide gels is less than 5 % the Stoch index can be used independently of the crystallinity. For raw kaolins, with percentages of kaolinite around 75 % and in the presence of quartz, feldspars and gels, the only indices which are not influenced by these minerals and gels are those of Stoch and Hughes & Brown, independently of the crystallinity of the kaolinite. Further it has been determined that the percentage of well ordered kaolinite as determined by the expert system is not reproducible for kaolinites of high crystallinity in the presence of minerals and amorphous material such as those studied.

Ako citovať:

ISO 690:

Galan, E., Aparicio, P., Gonzalez, I., La Iglesia, A. 1994. INFLUENCE OF ASSOCIATED COMPONENTS OF KAOLIN ON THE DEGREE OF DISORDER OF KAOLINITE AS DETERMINED BY XRD. In Geologica Carpathica Clays, vol. 3, no.2, pp. 59-75.

APA:

Galan, E., Aparicio, P., Gonzalez, I., La Iglesia, A. (1994). INFLUENCE OF ASSOCIATED COMPONENTS OF KAOLIN ON THE DEGREE OF DISORDER OF KAOLINITE AS DETERMINED BY XRD. Geologica Carpathica Clays, 3(2), 59-75.