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

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

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.

Clays and Clay Minerals; June 1976 v. 24; no. 3; p. 134-141; DOI: 10.1346/CCMN.1976.0240306
© 1976, The Clay Minerals Society
Clay Minerals Society (www.clays.org)