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Synthesis of clay-sized iron oxides under marine hydrothermal conditions

Published online by Cambridge University Press:  09 July 2018

N. Taitel-Goldman  and
A. Singer
N. Taitel-Goldman*
Affiliation:
The Open University, P.O. Box 39328 Tel Aviv, Israel The Seagram Center for Soil and Water Sciences, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, RehovotIsrael
A. Singer
Affiliation:
The Seagram Center for Soil and Water Sciences, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, RehovotIsrael
*
*E-mail: [email protected]
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Abstract

Goethite, lepidocrocite, magnetite and akaganeite were synthesized in 0.8 M, 2 M and 5 M NaCl solutions at various temperatures (25, 40, 60°C) under slightly acidic to slightly alkaline pH with or without Si additions. Elevated temperatures prevent complete oxidation of initial Fe2+ solutions and magnetite and siderite precipitate, accompanied by goethite and lepidocrocite. At higher salinity, O2 solubility is reduced and its distribution is limited, leading to coprecipitation of lepidocrocite, akaganeite and goethite.

Lepidocrocite morphology changes from plates at pH 5.5 through rods at pH 7 to multi-domainic crystals at pH 8.2, due to enhanced crystal growth along the c axis. Salinity and temperature have opposite effects on lepidocrocite crystallinity.

Goethite crystals are multi-domainic and twinning appears only at elevated temperatures. Increases in temperature and salinity improve goethite crystallinity as observed by IR spectra. Addition of Si up to Si/Fe = 0.1 retards crystal growth and Si-OH-stretching bands appear. At Si/Fe = 1 most of the precipitate is short range ordered.

Platy and rod-shaped lepidocrocite from the Thetis and Atlantis II Deeps, were probably formed under the slightly acidic conditions of the hydrothermal brines. The Si concentration was greater in Atlantis II Deep than in Thetis Deep, leading to larger lepidocrocite and goethite crystals in the latter.

Multi-domainic goethite could have precipitated throughout. Pure phase goethite might have precipitated in the less concentrated brine, whereas mixtures of goethite and lepidocrocite might have precipitated in the more concentrated brine, depending mainly on oxidation rate and oxygen mobility within the brine.

Keywords

akaganeitegoethitehydrothermal brineIRlepidocrocitemagnetitesynthesisTEM
Type
Research Article
Information
Clay Minerals , Volume 37 , Issue 4 , December 2002 , pp. 719 - 731
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2002

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References

Anschutz, P. & Blanc, G. (1995) Geochemical dynamics of the Atlantis II Deep (Red Sea): Silica behavior. Marine Geology, 128, 25–36.CrossRefGoogle Scholar
Bäcker, V.H. & Richter, H. (1973) Die rezente hydrothermal- sedimentäre Langerstätte Atlantis II Tief im Rotem Meer. Geologische Rundschau, Bd 62, 697–737.CrossRefGoogle Scholar
Bischoff, J.L. (1969) Red Sea geothermal brine deposits, their mineralogy, chemistry and genesis. Pp. 368–401 in: Hot Brines and Recent Heavy Metal Deposits in the Red Sea, Geochemical and Geophysical Account (Degens, E.T. and Ross, D.A., editors). Springer-Verlag Berlin/Heidelberg/New York.CrossRefGoogle Scholar
Cambier, P. (1986) Infrared study of goethites of varying crystallinity and particle size: 1. Interpretation of OH and lattice vibration frequencies. Clay Minerals, 21, 191–200.CrossRefGoogle Scholar
Cornell, R.M. & Giovanoli, R. (1986) Factors that govern the formation of multi-domainic goethite. Clays and Clay Minerals, 34, 557–564.CrossRefGoogle Scholar
Cornell, R.M. & Giovanoli, R. (1987) The influence of silicate species on the morphology of goethite grown from ferrihydrite. Journal of the Chemical Society, Chemical Communications, 413–414.CrossRefGoogle Scholar
Cornell, R.M. & Schwertmann, U. (1996) The Iron Oxides, Structure, Properties, Reactions, Occurrence and Uses.VCH Weinheim-New York- Basel-Cambridge-Tokyo 573 pp.Google Scholar
Cornell, R.M., Giovanoli, R. & Schindler, P.W. (1987) Effect of silicate species on the transformation of ferrihydrite into goethite and hematite in alkaline media. Clays and Clay Minerals, 35, 21–28.CrossRefGoogle Scholar
David, I. & Welch, A.J.E. (1956) The oxidation of magnetite and related spinels. Transactions of the Faraday Society, 52, 1642 ­ 1650.CrossRefGoogle Scholar
Glasauer, S., Friedl, J. & Schwertmann, U. (1999) Properties of goethites prepared under acidic and basic conditions in the presence of silicate. Journal of Colloid and Interface Science, 216, 106–115 .CrossRefGoogle ScholarPubMed
Hartmann, M. (1985) Atlantis II Deep brine system. Chemical processes, hydrothermal brines and Red Sea deep water. Marine Geology, 64, 157–177.CrossRefGoogle Scholar
Hartmann, M., Scholten, J.C., Stoffers, P. & F., Wehner (1998a) Hydrographic structure of brine-filled deeps in the Red Sea ­ new results from the Shaban, Kebrit, Atlantis II and Discovery Deep. Marine Geology, 144, 311–330.CrossRefGoogle Scholar
Hartmann, M., Scholten, J.C. & Stoffers, P. (1998b) Hydrographic structure of brine-filled deeps in the Red Sea: Correction of Atlantis II Deep temperatures. Marine Geology, 144, 331–332.CrossRefGoogle Scholar
Holm, N.G., Wadsten, T. & Dowler, M.J. (1982) β- FeOOH (Akaganeite) in the Red Sea. Estudíos Geologicós, 38, 367–371.Google Scholar
Holm, N.G., Dowler, M.J., Wadsten, T. & Arrhenius, G. (1983) β-FeOOH·Cln (Akaganeite) and Fe1­ xO (wustite) in hot brine from the Atlantis II Deep (Red Sea) and the uptake of amino acids by synthetic β-FeOOH·Cln . Geochimica et Cosmochimica Acta, 47, 1463–1470.CrossRefGoogle Scholar
Knedler, K.E. (1985) A geochemical and 57Fe Mossbauer investigation of East Pacific Rise and the Red Sea metalliferous sediments and other selected marine sedimentary deposits. PhD thesis, Victoria University of Wellington, New Zealand.Google Scholar
Lange, N.A. (1961) Handbook of Chemistry. McGraw- Hill Book Company, Inc., New York, Toronto, London.Google Scholar
Lewis, D.G. & Farmer, V.C. (1986) Infrared absorption of surface hydroxyl groups and lattice vibrations in lepidocrocite (γ-FeOOH) and bohemite (γ-AlOOH). Clay Minerals, 21, 93–100.CrossRefGoogle Scholar
Millero, F.J., Sotolongo, S. & Izaguirre, M. (1987) The oxidation kinetics of Fe(II) in seawater. Geochimica et Cosmochimica Acta, 51, 793–801.CrossRefGoogle Scholar
Pimentel, G.C. & McClettan, A.L. (1960) The Hydrogen Bond. W.H. Freeman & Co., San Francisco, London, 475 pp.Google Scholar
Quin, T.G., Long, G.J., Benson, C.G., Mann, S. & Williams, R.J.P. (1988) The influence of silicate and phosphate on the structural and magnetic properties of synthetic goethite and related oxides. Clays and Clay Minerals, 36, 165–175.CrossRefGoogle Scholar
Scholten, J.C., Stoffers, P., Walter, P. & Plunger, W. (1991) Evidence for episodic hydrothermal activity in the Red Sea, from the composition and formation of hydrothe rmal sediments, Thet is Deep. Tectonophysics, 190, 109–117 CrossRefGoogle Scholar
Schwertmann, U. & Cornell, R.M. (1991) Iron Oxides in the Laboratory: Preparation and Characterization. VCH Weinheim-New York-Basel-Cambridge, 137 pp.Google Scholar
Schwertmann, U. & Taylor, R.M. (1972) The influence of silicate on the transformation of lepidocrocite to goethite. Clays and Clay Minerals, 20, 159–164.CrossRefGoogle Scholar
Schwertmann, U. & Thalmann, H. (1976) The influence of [Fe(II)], [Si], and pH on the formation of lepidocrocite and ferrihydrite during oxidation of aqueous FeCl2 solutions. Clay Minerals, 11, 189–200.CrossRefGoogle Scholar
Schwertmann, U., Cambier, P. & Murad, E. (1985) Properties of goethites of varying crystallinity. Clays and Clay Minerals, 33, 369–378.CrossRefGoogle Scholar
Schwertmann, U., Friedl, J., Stanjek, H., Murad, E. & Bender Koch, C. (1998) Iron oxides and smectites from Atlantis II Deep, Red Sea. European Journal of Mineralogy, 10, 953–967.CrossRefGoogle Scholar
Shatkay, M. (1991) Dissolved oxygen in highly saline sodium chloride solutions and in the Dead Sea ­ measurements of its concentration and isotopic composition. Marine Chemistry, 32, 89–99.CrossRefGoogle Scholar
Sidhu, P.S., Gilkes, R.J. & Posner, A.M. (1977) Mechanism of the low temperature oxidation of synthetic magnetite. Journal of Inorganic and Nuclear Chemistry, 39, 1953 ­ 1958.CrossRefGoogle Scholar
Singer, A. & Stoffers, P. (1987) Mineralogy of a hydrothermal sequence in a core from the Atlantis II Deep, Red Sea. Clay Minerals, 22, 251–267.CrossRefGoogle Scholar
Stumm, W. & Lee, G.F. (1961) Oxygenation of ferrous iron. Industr ial Engineer ing Chemistry, 53, 143–146.CrossRefGoogle Scholar
Sung, W. & Morgan, J.J. (1980) Kinetics and products of ferrous iron oxygenation in aqueous systems. Environmental Science and Technology, 14, 561–568.CrossRefGoogle Scholar
Taitel-Goldman, N. & Singer, A. (2001) High resolution transmission electron microscopy study of newly formed sediments in the Atlantis II Deep, Red Sea. Clays and Clay Minerals, 49, 174–182.CrossRefGoogle Scholar
Taitel-Goldman, N. & Singer, A. (2002) Metastable Si-Fe phases in hydrothermal sediments of Atlantis II Deep, Red Sea. Clay Minerals, 37, 235–248.CrossRefGoogle Scholar
Taitel-Goldman, N., Bender-Koch, C. & Singer, A. (2002) Lepidocrocite in hydrothermal sediments of the Atlantis II and Thetis Deeps, Red Sea. Clays and Clay Minerals, 50, 186–197.CrossRefGoogle Scholar
Taitel-Goldman, N., Bender Koch, C. and Singer, A. (2003) Si-associated goethite in hydrothermal sediments of the Atlantis II and Thetis deeps, Red Sea. Clays and Clay Minerals (submitted).CrossRefGoogle Scholar
Taylor, R.M. (1984) Influence of chloride on the formation of iron oxides from Fe(II) chloride. Effect of (Cl) on the formation of lepidocrocite and its crystallinity. Clays and Clay Minerals, 32, 175–180.CrossRefGoogle Scholar
Torrent, J. & Guzman, R. (1982) Crystallization of Fe(III)-oxides from ferrihydrite in salt solutions: osmotic and specific ion effects. Clay Minerals, 17, 463–469.CrossRefGoogle Scholar
Weidler, P.G. Hug, S.J. Wetche, T.P. & Hiemstra, T. (1998) Determination of growth rates of (100) and (110) faces of synthetic goethite by scanning force microscop. Geochimica et Cosmochimica Acta, 62, 3407–3412.CrossRefGoogle Scholar