Abstract
Trimethylsilylated (TMS) magadiite and kenyaite were treated thermally and the influence of trimethylsilyl groups on the surface areas of the heat-treated products was investigated. The basal spacings of the TMS-magadiites treated up to 300°C were constant. When TMS-kenyaite was heat-treated, the basal spacing was kept at a constant value until 400°C. The specific surface areas of the products increased up to those temperatures. After the organic groups were burned, the interlayer spaces of the heat-treated TMS-magadiite and TMS-kenyaite were still expanded possibly by the presence of oxidized silyl groups in the interlayer spaces.
