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    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.
    KAWANO, Motoharu and TOMITA, Katsutoshi 1989. Rehydration properties of Na-rectorite from Makurazaki, kagoshima Prefecture, Japan.. Mineralogical Journal, Vol. 14, Issue. 8, p. 351.
    Reynolds, R. C. 1980. Crystal Structures of Clay Minerals and their X-Ray Identification. p. 249.
    SEGONZAC, G. DUNOYER 1970. THE TRANSFORMATION OF CLAY MINERALS DURING DIAGENESIS AND LOW-GRADE METAMORPHISM: A REVIEW. Sedimentology, Vol. 15, Issue. 3-4, p. 281.
    Hamilton, J. D. 1968. Triphormic clay minerals from the lower hunter permian succession of new South Wales. Journal of the Geological Society of Australia, Vol. 15, Issue. 1, p. 9.
    SATO, MITSUO 1965. Structure of Interstratified (Mixed-layer) Minerals. Nature, Vol. 208, Issue. 5005, p. 70.
    Yoder, H.S. and Eugster, H.P. 1955. Synthetic and natural muscovites. Geochimica et Cosmochimica Acta, Vol. 8, Issue. 5-6, p. 225.
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An occurrence of a regular mixed-layer clay-mineral

  • H. Heystek (a1)
Abstract

About twelve miles south-east of Burghersdorp in the Cape Province, South Africa, the unusual clay reported in this paper was first discovered on the farms 'Groenvlei' and 'Kuilfontein'. Later deposits were also uncovered on the farms 'Kapokkraal' and 'Kleinhoek'.

The clay-mineral appears to be of a very unusual type, namely, a regular mixed-layer clay-mineral (1:1 hydrous mica and montmorillonite). The mode of origin of the clay is also of interest in that it appears to be produced from a shale by hydrothermal alteration, due to intrusion of dolerite sheets.

Copyright
COPYRIGHT: © 1954, The Mineralogical Society
References
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14. Theron, (J.J.), An improved apparatus for the differential thermal analysis of minerals. Brit. Journ. Applied Phys., 1952. vol. 3, pp. 216.220.
15. Heystek, (H.) and Chase (E, B.M..), A study of the brown plastic clays occurring in the Transvaal. Trans. Brit. Ceram. Soc, 1953. vol. 38, pp. 482.96.
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Mineralogical Magazine
  • ISSN: 1876-1968
  • EISSN: 2515-821X
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