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An occurrence of a regular mixed-layer clay-mineral

Published online by Cambridge University Press:  14 March 2018

H. Heystek
H. Heystek*
Affiliation:
National Chemical Research Laboratory, South African Council for Scientific and Industrial Research, Pretoria
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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.

Information

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 30 , Issue 225 , June 1954 , pp. 400 - 408
Copyright
Copyright © 1954, The Mineralogical Society

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References

1. Grim, (B.E.), Modern concepts of clay minerals. Journ. Geol. Chicago, 1942. vol. 50, pp. 225.275. [M.A. 8-294.]CrossRefGoogle Scholar
2. Geunee, (J.W.), The structure of vermiculites and their collapse by dehydration. Amer. Min., 1934. vol. 19, pp. 557.575. [M.A. 6-181.]Google Scholar
3. Hendeicks, (S.B.) and Jefferson, (M.E.), Crystal structure of … mixed vermiculite-chlorites. Amer. Min., 1938. vol. 23, pp. 851.862. [M.A. 7-397.]Google Scholar
4. Nagelschmidt, (G.), X-ray diffraction experiments on illite and bravaisite. Min. Mag., 1944. vol. 27, pp. 59.61.Google Scholar
5. Macewan, (D.M.C), Some notes on the recording and interpretation of X-ray diagrams of soil clays. Journ. Soil Science, 1949. vol. 1, pp. 90.103.Google Scholar
6. Grim, (E.E.), Clay mineralogy. New York, 1953. [M.A. 13-184.]Google Scholar
7. Grim, (E.E.), and Eowland, (E.A.), Differential thermal analysis of clay minerals … Amer. Min., 1942. vol. 27, pp. 746.761. [M.A. 9-76.]Google Scholar
8. Brindley, (G.W.), editor, X-ray identification and crystal structures of clay minerals, 1951. Mineralogical Society, London.Google Scholar
9. White, (J.L.), Transformation of illite into montmorillonite. Proc. Soil Sci. Soc. Amer., 1951. vol. 15 (for 1950), pp. 129.133. [M.A. 11-546.]Google Scholar
10. Weaver, (C.E.), Mineralogy and petrology of some Ordovician K-bentonites and related limestones. Bull. Geol. Soc. Amer., 1953. vol. 64, pp. 921.943.CrossRefGoogle Scholar
11. Hendkicks, (S.B.) and Teller, (E.), X-ray interference in partially ordered lattices. Journ. Chem. Phys., 1942. vol. 10, pp. 147.167.Google Scholar
12. Bradley, (W.F.), The alternating layer sequence of rectorite. Amer. Min., 1950. vol. 35, pp. 590.595. [M.A. 11-454.]Google Scholar
13. Barshad, (I.), The effect of the interlayer cations on the expansion of the mica type crystal lattice. Amer. Min., 1950. vol. 35, pp. 225.238. [M.A. 11-221.]Google Scholar
14. Theron, (J.J.), An improved apparatus for the differential thermal analysis of minerals. Brit. Journ. Applied Phys., 1952. vol. 3, pp. 216.220.Google Scholar
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.Google Scholar