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Residual Manganese(II) Entrapped in Single-Layer-Hydrate Montmorillonite Interlayers

Published online by Cambridge University Press:  28 February 2024

A. U. Gehring ,
I. V. Fry ,
T. Lloyd  and
G. Sposito
A. U. Gehring
Affiliation:
Department of Soil Science, University of California Berkeley, California 94720
I. V. Fry
Affiliation:
Department of Plant Biology, University of California Berkeley, California 94720
T. Lloyd
Affiliation:
Department of Soil Science, University of California Berkeley, California 94720
G. Sposito
Affiliation:
Department of Soil Science, University of California Berkeley, California 94720
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Abstract

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Electron paramagnetic resonance (EPR) and Fourier transform infrared (FTIR) spectroscopy in combination with X-ray diffractometry and thermal methods were used to determine the coordination of residual exchangeable Mn(II) in an untreated sample of Wyoming montmorillonite. At room temperature, Mn(II) in a single-layer-hydrate interlayer was proposed to be coordinated directly with oxygen ions of the siloxane surface on one layer and to form water bridges to the oxygens on the siloxane surface of the opposite layer. Dehydration and collapse of the interlayer entrapped and thereby stabilized the partially solvated Mn(II) up to 600°C. A change to Mn(II) in highly symmetric coordination occurred during dehydroxylation of the montmorillonite structure between 600°C and 700°C. Manganese(II) remained coordinated at the surface but positioned in a bicapped trigonal antiprism formed by oxygens of the silicate structure. This coordination was metastable at 800°C when the structural decomposition of the clay mineral began.

Keywords

Electron paramagnetic resonanceMn(II) coordinationMontmorillonite
Type
Research Article
Information
Clays and Clay Minerals , Volume 41 , Issue 5 , October 1993 , pp. 565 - 569
Copyright
Copyright © 1993, The Clay Minerals Society

References

Bernas, B., 1968 A new method for the decomposition and comprehensive analysis of silicates by atomic absorption spectrometry Anal. Chem. 40 1682 – 1686 10.1021/ac60267a017.CrossRefGoogle Scholar
Coyne, L. M. and Banin, A., 1986 Effect of adsorbed iron on thermoluminescence and electron spin resonance spectra of Ca-Fe exchanged montmorillonite Clays & Clay Minerals 34 645 – 650 10.1346/CCMN.1986.0340604.CrossRefGoogle ScholarPubMed
Cuttler, A. H., 1980 The behavior of synthetic 57Fe-doped kaolin: Móssbauer and electron paramagnetic resonance studies Clay Miner. 15 429 – 444 10.1180/claymin.1980.015.4.10.CrossRefGoogle Scholar
Fanner, V. C., 1968 Infrared spectroscopy in clay mineral studies Clay Miner. 7 373 – 387 10.1180/claymin.1968.007.4.01.Google Scholar
Fanner, V. C., 1974 The Infrared Spectra of Minerals London Mineralogical Society.Google Scholar
Gehring, A. U., 1993 The Chemical Form of Vanadium (IV) in Kaolinite Clays and Clay Minerals 41 6 662 – 667 10.1346/CCMN.1993.0410604.CrossRefGoogle Scholar
Gehring, A. U. and Karthein, R., 1990 An EPR and ca-lorimetric study of iron oolitic samples from the Northampton ironstone Clay Miner. 25 303 – 311 10.1180/claymin.1990.025.3.06.CrossRefGoogle Scholar
Gehring, A. U., Karthein, R. and Reller, A., 1990 Activated state in the lepidocrocite structure during thermal treatment Naturwissenschaften 77 177 – 179 10.1007/BF01131161.CrossRefGoogle Scholar
Hall, P. L., 1980 The application of electron spin resonance spectroscopy to studies of clay minerals: I. Isomorphous substitutions and external surface properties Clay Miner. 15 321 – 335 10.1180/claymin.1980.015.4.01.CrossRefGoogle Scholar
McBride, M. and Perry, D. L., 1990 Electron spin resonance spectroscopy Instrumental Surface Analysis of Geological Materials New York VCH Publishing 233 – 281.Google Scholar
McBride, M., Pinnavia, T. J. and Mortland, M. M., 1975a Electron spin relaxation and the mobility of manganese (II) exchange ions in smectites Am. Mineral. 60 66 – 72.Google Scholar
McBride, M., Pinnavia, T. J. and Mortland, M. M., 1975b Electron spin resonance study of cation orientation in restricted water layers on phyllosilicate (smectite) surfaces J. Phys. Chem. 79 2430 – 2435 10.1021/j100589a018.CrossRefGoogle Scholar
Reddy, M. R. and Perkins, H. F., 1976 Fixation of manganese by clay minerals Soil Sci. 121 21 – 24 10.1097/00010694-197601000-00004.CrossRefGoogle Scholar
Shimoda, S. and Brydon, J. E., 1971 I.R. studies of some interstratified minerals of mica and montmorillonite Clays & Clay Minerals 19 61 – 66 10.1346/CCMN.1971.0190107.CrossRefGoogle Scholar
Simánek, E. and Müller, K. A., 1970 Covalency and hy-perfine structure constant A of iron group impurities in crystals J. Phys. Chem. Solids 31 1027 – 1040 10.1016/0022-3697(70)90313-6.CrossRefGoogle Scholar
Sposito, G. and Prost, R., 1982 Structure of water adsorbed on smectites Chem. Rev. 82 553 – 573 10.1021/cr00052a001.CrossRefGoogle Scholar
Tikhomirova, N. N., Dobryakov, S. N. and Nikolaeva, I. V., 1972 The calculation of the ESR spectrum of Mn2+ ions in polycrystalline samples Phys. Stat. Sol. (a) 10 593 – 603 10.1002/pssa.2210100229.CrossRefGoogle Scholar
Van Olphen, H. and Fripiat, J. J., 1979 Data Handbook for Clay Materials and Other Nonmetallic Minerals Oxford Pergamon.Google Scholar
Wertz, J. E. and Bolton, J. R., 1972 Electron Spin Resonance New York McGraw-Hill.Google Scholar