Potassium-Depleted Muscovite. Part I. Preparation Using Filtration Process for Treatment with Molten Lithium Nitrate
The reaction between molten lithium nitrate and muscovite does not go to completion in a single treatment because of the equilibrium restriction imposed by the presence of potassium in the melt. An apparatus consisting of a stainless steel vessel with a porous stainless steel filter, valve and vacuum connections was designed to eliminate this restriction and to provide for more complete removal of the equilibrium melt in each successive treatment.
Macroscopic swelling of the muscovite in the molten lithium nitrate was observed after prolonged treatment. x-Ray diffraction examination of samples of solidified melt revealed intracrystalline swelling in the muscovite.
Unable to display preview. Download preview PDF.
- Barshad, I. (1948) Vermiculite and its relation to biotite as revealed by base exchange reactions, x-ray analyses, differential thermal curves, and water content: Amer. Min., v. 33, pp. 655–678.Google Scholar
- Denison, I. A., Fry, W. H. and Gile, P. L. (1929) Alteration of muscovite and biotite in the soil: U.S. Dept. Agr. Tech. Bull. 128, 32 pp.Google Scholar
- Spain, J. M. (1958) A study of the structures and properties of certain tetra-alkyl ammonium montmorillonites: Ph.D. Thesis, Purdue University.Google Scholar
- White, J. L. (1956) Reactions of molten salts with layer-lattice silicates: Clays and Clay Minerals, Natl Acad. Sci.—Natl. Res. Council pub. 454, pp. 133–146.Google Scholar