R. F. Youell

Bio: R. F. Youell is an academic researcher. The author has contributed to research in topics: Montmorillonite & Chlorite. The author has an hindex of 1, co-authored 1 publications receiving 12 citations.

Interstratified Clay Minerals

Abstract: Interstratification is a phenomenon that was first observed on studying clay minerals by X-ray diffraction. It was noted that the majority of them had basal reflections (001), which did not form a regular series. It was verified that this irregularity was due to the interstratification of different types of crystalline layers.

Electrochemical alteration of clay soils

Abstract: The composition and physical properties of three clay soils were altered by introducing aluminum under an electro-chemical gradient in order to evaluate the role of pH in controlling changes in soil composition and the feasibility of pH buffering during electrochemical treatment.

Controlled Synthesis of Heteropolytypic (Mixed-Layer) Clay Minerals

Abstract: The conditions for the formation of various heteropolytypic or mixed-layer phases were determined in a hydrothermal study of synthetic mixtures along the join talc—Na-saponite—Na-phlogopite composition. Heteropolytypes of talc and saponite from compositions between talo and a saponite solid solution and of saponite and a 10 A sodium mica (Na-phlogopite?) from compositions lying between saponite solid solutions and Na-phlogopite have been prepared reproducibly. At 1 kb in the temperature range 450-575° C, randomly stacked heteropolytypic phases were formed and persisted. At higher pressures the regular heteropolytypes (regularly interstratified or mixed-layer minerals), generally 1:1 phases, were formed. The genesis of heteropolytypes in nature is discussed on the basis of these results.