Evidence of forces produced by bilayers composed of long molecules

Nemetschek, Th.; Jonak, R.; Nemetschek-Gansler, H.; Riedl, Harald Udo von; Schilling, Viktor; Bordas, J.; Koch, Michel H. J.

doi:10.1007/bf00405495

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Odd~even Alteration1

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1982

1985

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Cited by 3 publications

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“…Odd/even differences have been observed for alkylammonium or alkylamine derivatives of smectites and vermiculites but are relatively small (Brindley, 1965;Lagaly & Weiss, 1970;Lagaly, 1982). Odd/even effects have been reported recently in bilayers of biological systems (Nemetschek et al, 1980). A distinct alternation is observed for the alkylammonium exchanged nickel arsenates (Table 1) which are in good agreement with the observed values of 3.0 and 1.5 A for n < 12 and 3.3 and 1.2 A for n > 11.…”

Section: Odd~even Alterationmentioning

confidence: 97%

The brittle mica-like KNiAsO₄ and its organic derivatives

Beneke

Lagaly

1982

Clay miner.

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The nickel arsenate KNiAsO4 has a mica-like layer structure with surface charge densities similar to brittle micas. In contrast to micas it easily exchanges alkylammonium ions. The interlayers have paraffin-type chain arrangements, as in alkylammonium vermiculites and alkylamine smectites and vermiculites, but the very regular chain packing causes a marked odd/even alternation of the basal spacings. The reactions of KNiAsO4 throw light on the exchange behaviour of micas.

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Section: Odd~even Alterationmentioning

confidence: 97%