Abstract
Clay mineral specimens used in this study were kaolin mineral (8), illite (14), montmorillonite (6), chlorite (4), vermiculite (4) and non-clay minerals (11). Specimens were prepared as mull in nujol and mounted between sodium chloride cover slides. The infra-red spectra of such various kinds of clay minerals have been examined in the region 3800-700cm-1. Especially, the spectra in the region 3800-3200cm-1 were obtained by using Graing Spectrophotometer having excellent resolution power. From the spectra, the character of absorption bands of each clay mineral was discussed.
