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The Status of Clay Mineral Structures

Published online by Cambridge University Press:  01 July 2024

S. W. Bailey
S. W. Bailey*
Affiliation:
Department of Geology, University of Wisconsin, Madison, Wisconsin, USA
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Abstract

The basic outlines of most of the hydrous layer silicate structures were determined during the 1930’s. Present escalating interest in obtaining additional detail is indicated by (a) publication of over twenty structural refinements (2-D or 3-D) during 1954-64, (b) publication of at least nine structures in 1965 or early 1966, and (c) personal communication that at least fifteen additional refinements are in progress. Points of especial interest in these recent studies follow.

  1. 1. Octahedral cation order is common, but tetrahedral cation order is confirmed in only three cases. Because ordering of Si, Al does not significantly affect the statistical tests for centrosymmetry, centrosymmetric space groups that do not permit order should be avoided during refinement.

  2. 2. Oversize tetrahedral sheets articulate with smaller octahedral sheets by tetrahedral rotation and, for dioctahedral species, by tetrahedral tilting around vacant octahedra. The latter mechanism influences the type and regularity of layer sequences. Undersize tetrahedral sheets articulate with larger octahedral sheets by tilting plus octahedral contraction or by inversion of some tetrahedra.

  3. 3. The amount and direction of tetrahedral rotation and tilt, length of T—O, M—O, and O—O bonds, sheet thicknesses, and relation of cell dimensions to composition can now be predicted with some confidence.

  4. 4. Variation in layer stacking (polytypism) is common. In some cases the stabilities of different polytypes can be explained by the relative amounts of repulsion and attraction between the ions in the structures. The stabilities can be correlated with the energy available in the environment of crystallization.

Type
Research Article
Information
Clays and Clay Minerals , Volume 14 , February 1966 , pp. 1 - 23
Copyright
Copyright © Clay Minerals Society 1966

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References

Bailey, S. W. and Brown, B. E. (1962) Chlorite polytypism: I. Regular and semirandom one-layer structures: Amer. Min. 47, 819–50.Google Scholar
Bailey, S. W., Hurley, P. M., Fairbairn, H. W. and Pinson, W. H. (1962) K-Ar dating of sedimentary illite polytypes: Geol. Soc. Amer. Bull. 73, 1167–70.CrossRefGoogle Scholar
Brown, B. E. and Bailey, S. W. (1963) Chlorite polytypism: II. Crystal structure of a one-layer Cr-chlorite: Amer. Min. 48, 42–61.Google Scholar
Burnham, Charles W. and Radoslovich, E. W. (1965) Refinement of the crystal structures of coexisting muscovite and paragonite: Clays and Clay Minerals, Proc. 13th Conf., Pergamon Press, New York (in press).Google Scholar
Burns, Allan F. and White, Joe L. (1963) The effect of potassium removal on the b-dimension of muscovite and dioctahedral soil micas: Proc. Internat. Clay Conf., Stockholm, Pergamon Press, New York, pp. 9–16.Google Scholar
Donnay, Gabrielle, Donnay, J. D. H. and Takeda, Hiroshi (1964) Trioctahedral one-layer micas. II. Prediction of the structure from composition and cell dimensions: Acta Cryst. 17, 1374–81.CrossRefGoogle Scholar
Eggleton, R. A. and Bailey, S. W. (1966) Structural aspects of dioctahedral chlorite: Amer. Min. 51 (in press).Google Scholar
Lindqvist, Bengt (1962) Polymorphic phase changes during heating of dioctahedral layer silicates: Geol. Foren. Forhandl. 84, 224–9.Google Scholar
Nelson, Bruce W. and Roy, Rustum (1958) Synthesis of the chlorites and their structural and chemical constitution: Amer. Min. 43, 707–25.Google Scholar
Newnham, Robert E. (1961) A refinement of the dickite structure and some remarks on polymorphism in kaolin minerals: Min. Mag. 32, 683–704.Google Scholar
Radoslovich, E. W. (1959) Structural control of polymorphism in micas: Nature 183, 253.CrossRefGoogle Scholar
Radoslovich, E. W. (1963) The cell dimensions and symmetry of layer-lattice silicates. IV. Interatomic forces: Amer. Min. 48, 76–99.Google Scholar
Shirozu, Haruo and Bailey, S. W. (1965) Chlorite polytypism: III. Crystal structure of an orthohexagonal iron chlorite: Amer. Min. 50, 868–85.Google Scholar
Shirozu, Haruo and Bailey, S. W. (1966) Crystal structure of a two-layer Mg-vermiculite: Amer. Min. 51 (in press).Google Scholar
Smith, J. V. and Bailey, S. W. (1963) Second review of Al—O and Si—O tetrahedral distances: Acta Cryst. 16, 801–11.CrossRefGoogle Scholar
Smith, J. V. and Yoder, H. S. (1956) Experimental and theoretical studies of the mica polymorphs: Min. Mag. 31, 209–35.Google Scholar
Steinfinx, Hugo (1958) The crystal structure of chlorite. I. A monoclinic polymorph: Acta Cryst. 11, 191–5.Google Scholar
Steinfink, Hugo (1961) Accuracy in structure analysis of layer silicates: Some further comments on the structure of prochlorite: Acta Cryst. 14, 198–9.CrossRefGoogle Scholar
Taxeuchi, Y. (1965) Structures of brittle micas: Clays and Clay Minerals, Proc. 13th Conf., Pergamon Press, New York (in press).Google Scholar
Threadgold, I. M. (1963) The crystal structures of hellyerite and nacrite: Ph.D. thesis, Univ. Wisconsin.Google Scholar
Veitch, L. G. and Radoslovich, E. W. (1963) The cell dimensions and symmetry of layer-lattice silicates. III. Octahedral ordering: Amer. Min. 48, 62–75.Google Scholar
Velde, V. (1965) Experimental determination of muscovite polymorph stabilities: Amer. Min. 50, 436–49.Google Scholar
Yoder, H. S. and Eugster, H. P. (1955) Synthetic and natural muscovites: Geochim. Cosmochim. Acta 7, 225–80.Google Scholar