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The Structures of Ornithine-Vermiculite and 6-Aminohexanoic Acid-Vermiculite

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Clays and Clay Minerals

Abstract

Fourier syntheses have been used to establish the arrangement of organic molecules in the interlamellar regions of a 16.10 Å phase of ornithine-vermiculite and a 16.92 Å phase of 6-aminohexanoic acid-vermiculite. The organic cations form two layers parallel to the silicate surfaces in ornithine-vermiculite and in 6-aminohexanoic acid-vermiculite the organic cations form ascending and descending “stairs” from the silicate sheets.

Ornithine-vermiculite forms a true single layer polytype but by contrast 6-aminohexanoic acid-vermiculite is two-layered and has a true c axis of 34.09 Å. Since a two layered vermiculite was used as a starting material to prepare the organic complexes, exchangeable organic cations affect the stacking sequence of the silicate sheets.

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Authors
  1. P. G. Slade
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  2. M. I. Telleria
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  3. E. W. Radoslovich
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Slade, P.G., Telleria, M.I. & Radoslovich, E.W. The Structures of Ornithine-Vermiculite and 6-Aminohexanoic Acid-Vermiculite. Clays Clay Miner. 24, 134–141 (1976). https://doi.org/10.1346/CCMN.1976.0240306

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  • DOI: https://doi.org/10.1346/CCMN.1976.0240306

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