Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-20T03:28:20.791Z Has data issue: false hasContentIssue false
  • English
  • Français

A Mössbauer study of the effect of dithionite/citrate/bicarbonate treatment on a vermiculite, a smectite and a soil

Published online by Cambridge University Press:  09 July 2018

T. Ericsson ,
J. Linares  and
E. Lotse
T. Ericsson
Affiliation:
Deparment of Mineralogy and Petrology, Institute of Geology, University of Uppsala
J. Linares
Affiliation:
Institute of Physics, University of Uppsala
E. Lotse
Affiliation:
Swedish University of Agricultural Sciences, Uppsala, Sweden
Get access Rights & Permissions [Opens in a new window]

Extract

When describing clay minerals of natural origin one often has to take into account the possibility that they contain other phases, e.g. iron oxides and hydroxides which may form a ‘coating’ on the clay mineral itself or occur as physically inseparable ultra-fine particles. These iron oxyhydroxides are sometimes difficult to detect by XRD as a consequence of their very small ‘domain volumes’ (Kodama et al., 1977). The iron oxyhydroxides are normally removed chemically prior to detailed characterization of the clay mineral. Removal of iron oxyhydroxide coatings facilitates dispersion and subsequent particle-size fractionation of minerals and soils and also enhances the parallel orientation, and therefore the intensity, of basal X-ray reflections of layer-silicates.

Type
Notes
Information
Clay Minerals , Volume 19 , Issue 1 , February 1984 , pp. 85 - 91
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bancroft, G.M. (1973) Mössbauer Spectroscopy. An Introduction for Inorganic Chemists and Geochemists. McGraw Hill Book Co., London.Google Scholar
Coey, J.M.D. (1980) Clay minerals and their transformations studied with nuclear techniques: The contribution of Mössbauer spectroscopy. At. Energy Rev. 18, 73–124.Google Scholar
Dolnicar, J. (1981) Application of Mössbauer spectroscopy in mineralogy, soil science and ceramics: coordinated research programme, 1977-1980. At. Energy Rev., Suppl 2, 257–268. International Atomic Energy Agency, Vienna.Google Scholar
Ericsson, T., Wäppling, R. & Punakivi, K. (1977) Mössbauer spectroscopy applied to clay and related minerals. Sver. Geol. Unders. 99, 229–244.Google Scholar
Forsyth, J.B., Hedley, I.G. & Johnson, C.E. (1968) The magnetic structure and hyperfine field of goethite (α-FeOOH).y. Phys. C. (Proc. Phys. Soc) 1, 179–188.Google Scholar
Heller-Kallai, L. & Rozenson, I. (1981) The use of Mössbauer spectroscopy of iron in clay mineralogy. Phys. Chem. Miner. 7, 223–238.Google Scholar
Johnson, C.E. (1969) Antiferromagnetism of γ-FeOOH: a Mössbauer effect study. J. Phys. C (Solid St. Phys.) 2, 1996–2002.Google Scholar
Kodama, H., McKeague, J.A., Tremblay, R.J., Gosselin, J.R. & Townsend, M.G. (1977) Characterization of iron oxide compounds in soils by Mössbauer and other methods. Can. J. Earth Sci. 14, 1–15.CrossRefGoogle Scholar
Van der Kraan, A.M. & Van Loef, J.J. (1966) Superparamagnetism in submicroscopic α-FeOOH particles observed by the Mössbauer effect. Phys. Letters 20, 614–616.CrossRefGoogle Scholar
Mehra, O.P & Jackson, M.L. (1960) Iron oxide removal from soils and clays by a dithionite-citrate system buffered with sodium bicarbonate. Clays Clay Miner. 7, 317–327.Google Scholar
Roth, C.B., Jackson, M.L., Lotse, E.G. & Syers, J.K. (1968) Ferrous-ferric ratio and CEC changes of deferration of weathered micaceous vermiculite. IsraelJ. Chem. 6, 261–273.Google Scholar
Rozenson, I. & Heller-Kallai, L. (1976) Reduction and oxidation of Fe3+ in dioctahedral smectites—I: reduction with hydrazine and dithionite. Clays Clay Miner. 24, 271–282.Google Scholar
Rozenson, I. & Heller-Kallai, L. (1978) Reduction and oxidation of Fe3+ in dioctahedral smectites III: Oxidation of octahedral iron in montmorillonite. Clays Clay Miner. 26, 88–92.Google Scholar