Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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The Influence of Polytypism and Impurities on the Phase Transformation of Kaolins: II. Halloysite

다중구조형 차이와 불순물이 카올린광물의 상전이에 미치는 영향: II. 할로이사이트

  • 이수정 (연세대학교 지구시스템과학과)
  • Published : 1999.08.01
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Abstract

Mullitization of halloysite was examined with special attention to the influence of polytypism and impurities on the phase transformation. The phase transformation sequence in halloysite is identical with those in kaolinite and in dickite. Difference in the phase transformation above $1000^{\circ}C$ in kaolin minerals is attributed to the different crystal structures of metakaolins or the effect of impurities. Growth of mullite crytals in the discordered kaolinte including halloysite or illite occurs at about $100^{\circ}C$ lower temperature. Cristobalite is also hardly produced.

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References

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