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Determination of layer-charge density of expandable 2:1 clay minerals in soils and loess sediments using the alkylammonium method

Published online by Cambridge University Press:  09 July 2018

G. Rühlicke  and
E. A. Niederbudde
G. Rühlicke
Affiliation:
Institut für Bodenkunde, T. U. München-Weihenstephan, 8050 Freising, FRG
E. A. Niederbudde
Affiliation:
Institut für Bodenkunde, T. U. München-Weihenstephan, 8050 Freising, FRG
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Abstract

The alkylammonium adsorption method for the determination of layer-charge density was slightly modified and applied to mixtures of expandable clay minerals (i.e. predominantly 18 Å minerals after glycerol sorption) from two loess samples and two soils (Haplaquept and Aquentic Chromudert) having different K-adsorption properties. The layer-charge density of the so-called 18 Å minerals from these sediments and soil samples varied between −0·23 and −0·85 per formula unit, which suggested the presence of different amounts of vermiculite within the 18 Å minerals. The amounts of these vermiculites were related to K-fixing and K-buffering properties of the different samples. High-resolution electron micrographs of vermiculites saturated with tetradecylammonium exhibited a basal spacing of 25 Å. It was confirmed, that the alkylammonium ions in the interlayers of the vermiculites formed a paraffin-type structure. In the fine clay from the loess samples an interstratification of vermiculite and illitic layers was observed.

Type
Research Article
Information
Clay Minerals , Volume 20 , Issue 3 , September 1985 , pp. 291 - 300
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985

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References

Black, C.A. (1965) Methods of Soil Analysis I and II. American Society of Agronomy Inc., Madison, Wisconsin, USA.Google Scholar
Brindley, G.W. (1966) Ethylene glycol and glycerol complexes of smectites and vermiculites. Clay Miner. 6, 237–259.Google Scholar
Greene-Kelly, R. (1953) The identification of montmorillonoids in clays. J. Soil. Sci. 4, 233–237.Google Scholar
Lagaly, G. (1981) Characterization of clays by organic compounds. Clay Miner. 16, 1–21.Google Scholar
Lagaly, G. (1982) Layer charge heterogeneity in vermiculites. Clays Clay Miner. 30, 215–222.Google Scholar
Lagaly, G. & Weiss, A. (1970) Anordnung und Orientierung kationischer Tenside auf ebenen Silicatoberflächen. Kolloidzeitschrift., Zeitschrift Polymer. 237, 266–273. 364-368; 238, 485-493.Google Scholar
Lagaly, G. & Weiss, A. (1971) Neue Methoden zur Charakterisierung und Identifizierung quellungsfähiger Dreischichttonminerale. Z. Pflanzenern., Bodenk. 130, 9–24.Google Scholar
Lagaly, G. & Weiss, A. (1975) The layer charge of smectific layer silicates. Proc. Int. Clay Conf. Mexico City, 157–172.Google Scholar
Lagaly, G., Fernandez, Gonzales M. & Weiss, A. (1976) Problems in layer-charge determination of montmorillonites. Clay Miner. 11, 173–187.Google Scholar
Niederbudde, E. A. (1973) Beziehungen zwischen K-Fexierungsvermögen und Drieschicht-Tonmineralen in Bodenprofilen aus Löß. Z. Pflanzenern., Bodenk. 135, 196–208.Google Scholar
Niederbudde, E.A. (1975) Veränderungen yon Dreischicht-Tonmineralen dutch natives K in holozänen Lößböden Mitteldeutschlands und Niederbayerns. Z. Pflanzenern. Bodenk. 138, 217–234.Google Scholar
Niederbudde, E.A. (1978) Tonminerale als Faktoren der K-Verfügbarkeit in Böden Bayerns. Landwirtschaftl. Forsch. SH 35, 193–204.Google Scholar
Niederbudde, E.A. & Kussmaul, H. (1978) Tonmineraleigenschaften und -umwandlungen in Parabraunerde- Profilpaaren unter Acker und Wald in Süddeutschland. Geoderma 20, 239–255.Google Scholar
Rühlicke, G. & Kohler, E.E. (1981) A simplified procedure for determining layer charge by the n-Alkylammonium method. Clay Miner. 16, 305–307.Google Scholar
Stul, M.S. & Mortier, W.J. (1974) The heterogeneity of the charge density in montmorillonites. Clays Clay Miner. 22, 391–396.Google Scholar
Vali, H. (1983) Vergleichende elektronenoptische und röntgenographische Untersuchungen zur Kristallstruktur und Morphologie yon quellfähigen und nieht quellenden 2:1 Schichtsilikaten. Dissertation, Fakult. Geowissenschaft. T.U. München-Garching.Google Scholar