Abstract
Well-crystallized, natural goethite has been investigated as a function of temperature. The saturation magnetic hyperfine field was found to be 507 kOe and the Néel temperatureT N=(400±2) K. The antiferromagnetic structure is stable in external fields of up to 6O kOe and the spin direction is at right angles with respect to the EFG's principal axis. AtT/T N<0.5, the reduced hyperfine field varies asT 2 and in the range 0.80<T/T N<0.97 asT 1/3. From the temperature dependence of the isomer shift, the Debije temperature was found to be 440 K from which a relative Mössbauer fraction of 0.96 against hematite was evaluated.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
E. Murad and U. Schwertmann, Clay Minerals18 (1983) 301.
A. Govaert, C. Dauwe, P. Plinke, E. De Grave and J. De Sitter, J. Physique Colloq37 (1976) C6–825.
F. van der Woude and A.J. Dekker, Phys. Status Solidi13 (1966) 181.
J.B. Forsyth, I.G. Hedley and C.E. Johnson, J. Phys. C. Ser. 21 (1968) 179.
E. De Grave, R. Vanleerberghe, L. Verdonck and G. De Geyter, Phys. Chem. Minerals11 (1984) 85.
D.D. Amarasiriwardena, E. De Grave, L.H. Bowen and S.B. Weed, Clays & Clay Minerals (in press).
R. Kubo, Phys. Rev.87 (1952) 568.
E. Callen and H.B. Callen, J. Appl. Phys.36 (1965) 1140.
R.V. Pound and G.A. Rebka Jr., Phys. Rev. Letters4 (1960) 274.
E. De Grave, A.E. Verbeeck and D.G. Chambaere, Phys. Letters107A (1985) 181.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
de Grave, E., Vandenberghe, R.E. 57Fe Mössbauer effect study of well-crystallized goethite (α-FeOOH). Hyperfine Interact 28, 643–646 (1986). https://doi.org/10.1007/BF02061530
Issue Date:
DOI: https://doi.org/10.1007/BF02061530