カオリン鉱物と緑泥石との判定法

概要

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There are some ambiguous points to identify clay minerals. One of them is difficulty of identifing kaolin and chlorite minerals in its mixture and/or complex clay mineral mixtures. This difficulty is mainly caused by overlapping of (OOL) reflection of kaolin minerals and chlorite. The writers have been examined and discussed many methods of identification such as; differential thermal analysis, X-ray analysis, infra-red analysis, and electron microscopic technique. Differential thermal analysis is effective for discrimination of kaolin minerals. In X-ray analysis, it is required many treatment such as; heat and reagent treatments. After heating sample to 500-800℃, increasing of 14 Å reflection intensity shows presence of chlorite. Effect of treatment with hydrochloric acid is examined for differentiation between kaolin and chlorite minerals. According to investigation of infra-red spectra of many clay minerals, kaolin minerals have a characteristic triple band in OH region. In the triple band, the band near 3695 cm^<-1> is noticed to be effective for determination of kaolin minerals. Combined use of these experimental methods was proved to be very effective, as the shortcomings of each method may be compensated each other. In conclusion, table for identification of kaolin and chlorite minerals was shown.
日本粘土学会の論文
1963-11-01