STUDY OF SYNTHETIC CLAY-MINERALS .3. SYNTHESIS AND CHARACTERIZATION OF 2-DIMENSIONAL TALC

''Two dimensional'' talc was prepared by the hydrothermal reaction of various silicas with magnesium hydroxide. The precipitated and activated silicas were especially available as starting materials. The powder X-ray diffraction data indicated that the resulting talc consisted of no-strafied and random layered structure. According to the IR spectrum, no solid acidity, i.e. Bronsted and Lewis acid sites were found. The specific surface area was over 500 m2 g-1. A large amount of water was adsorbed and partially combined with the surface of lamellar talc. As a result, the artificial talc would receive applications such as emulsifying agents to the mixture of liquid paraffin and water.