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

Published online by Cambridge University Press:  01 July 2024

M. I. Telleria ,
P. G. Slade  and
E. W. Radoslovich
M. I. Telleria
Affiliation:
C.S.I.R.O. Division of Soils, Glen Osmond, South Australia 5061
P. G. Slade
Affiliation:
C.S.I.R.O. Division of Soils, Glen Osmond, South Australia 5061
E. W. Radoslovich
Affiliation:
C.S.I.R.O. Division of Soils, Glen Osmond, South Australia 5061
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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.

Type
Research Article
Information
Clays and Clay Minerals , Volume 25 , Issue 2 , April 1977 , pp. 119 - 125
Copyright
Copyright © Clay Minerals Society 1977

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