| 摘要 |
<p>The formation of new materials in the form of alumino-silicate derivatives from 2:1 layer clay minerals which are obtained by the chemical modification of 2:1 layer clay minerals by reaction with a salt having the formula MX where M is ammonium ion or alkali metal cation and X is halide. The new materials have the following characteristics: (a) an amorphous X-ray diffraction signal manifest as a broad hump using X-ray powder diffraction between 22° and 32° 2υ using CuKα radiation; and (b) the presence of primarily tetrahedrally co-ordinated aluminium.</p> |
