Intercalation of Nickel Hydroxide into Large Crystal of Vermiculite

Vermiculite of centimeter size was treated with a nickel nitrate solution under hydrothermal condition. A complex intercalated with nickel hydroxide was produced at the part within 100 (mu)m from the edge and 10 (mu)m from the surface under the conditions of 250 °C for 100 h. In the inner regions, nickel hydroxide was intercalated in the layers having no fixed K, but not intercalated in the region having fixed K.