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X-Ray Study of the Interlayer Region of a Barium-Vermiculite

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Clays and Clay Minerals

Abstract

An X-ray diffraction analysis of a barium-vermiculite shows it to have a triclinic unit cell with the following dimensions a = 5.33, b = 9.26, c = 12.47 Å, α = 100.75°, ß = 93.5° and γ = 90°. The proposed structure, adjusted in space group Cl, has the exchangeable cations approximately over the ditrigonal holes of the silicate surface and on either side of a hexagonal network of water molecules extending over the middle of the interlamellar region. The interlayer material imposes a relative displacement of ± b/4 on adjacent silicate sheets. The importance of these displacements, not previously found in layer silicates, is emphasized.

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Authors and Affiliations

  1. C.S.I.R.O. Division of Soils, Glen Osmond, South Australia, Australia, 5061

    M. I. Telleria, P. G. Slade & E. W. Radoslovich

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  1. M. I. Telleria
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  2. P. G. Slade
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  3. E. W. Radoslovich
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Telleria, M.I., Slade, P.G. & Radoslovich, E.W. X-Ray Study of the Interlayer Region of a Barium-Vermiculite. Clays Clay Miner. 25, 119–125 (1977). https://doi.org/10.1346/CCMN.1977.0250208

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  • DOI: https://doi.org/10.1346/CCMN.1977.0250208

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