Infrared Study of Selective Deuteration of Kaolinite and Halloysite at Room Temperature

Abstract

Deuteration of expanded hydrazine-kaolinite complex at room temperature shifts the infrared stretching frequencies of the inner-surface hydroxyls from 3695, 3670, and 3650 cm(-1) to 2725, 2710, and 2698 cm(-1), respectively, and the inner hydroxyls absorbing at 3620 cm(-1) to 2675 cm(-1). The OH-OD exchange for the inner-surface hydroxyls varies from 60 to 67 percent, whereas it is only 22 percent for the inner hydroxyls.