Abstract
Kaolinite was mechanically ground in the presence of NaCl, KCl, RbCl and CsCl and in their absence, and i.r. spectra were recorded after various periods of grinding. Changes in the intensity and sharpness of the absorption bands were interpreted using accepted assignments. The following effects were observed: 1. (1) Destruction of the kaolinite structure and formation of amorphous material. 2. (2) Solid state diffusion of atoms, particularly protons, leading to the formation of lattice defects. 3. (3) Delamination of the tactoid of kaolinite. 4. (4) Enhanced hydration. The relative weight and significance of these reactions depend on the alkali halide present. Thus, after grinding, different spectra are obtained with different alkali halides. In the presence of CsCl hydrogen bonds were formed between basal hydroxyls and sorbed water molecules.
Original language | English |
---|---|
Pages (from-to) | 131-138 |
Number of pages | 8 |
Journal | Powder Technology |
Volume | 12 |
Issue number | 2 |
DOIs | |
State | Published - 1975 |