Abstract
IN work on the reaction of molten salts with layer-lattice silicates, it was found that molten lithium nitrate removed a large portion of the potassium from muscovite (< 5µ) and lithium was fixed in a not readily exchangeable manner1. It was suggested that lithium ions migrated into the vacant octahedral positions of the dioctahedral micas in a manner similar to that postulated previously by Hofmann and Klemen2 and Greene-Kelly3 for lithium-saturated montmorillonite on heat treatment. X-ray diffraction measurements of the 060 spacing of muscovite treated with lithium showed no significant increase, whereas an increase might be expected in conversion of a dioctahedral composition to a trioctahedral composition. Attempts to apply the infra-red technique of Serratosa and Bradley4 for determination of the orientation of OH-bond axes to indicate formation of a trioctahedral composition were also unsuccessful.
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References
White, J. L., Nature, 174, 799 (1954); Proc. Fourth Nat. Conf. on Clays and Clay Minerals, U.S. Nat. Acad. Sci.-Nat. Res. Coun. Pub. 456, 133 (1956).
Hofmann, U., and Klemen, R., Z. anorg. Chem., 262, 95 (1950).
Greene-Kelly, R., Clay Minerals Bull., 1, 221 (1952); Nature, 170, 1130 (1952).
Serratosa, J. M., and Bradley, W. F., J. Phys. Chem., 62, 1164 (1958).
Stubican, V., and Roy, R., abst. Pittsburgh, Pa., meeting of the Mineralogical Society of America (Nov. 1959); abst. Cleveland meeting of the American Chemical Society (April 1960).
Serratosa, J. M., Amer. Mineral., 45, 1101 (1960).
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WHITE, J., BAILEY, G., BROWN, C. et al. Infra-red Investigation of the Migration of Lithium Ions into Empty Octahedral Sites in Muscovite and Montmorillonite. Nature 190, 342 (1961). https://doi.org/10.1038/190342a0
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DOI: https://doi.org/10.1038/190342a0
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