Table 2 Main mineral composition of Guilin red clay.

From: Experimental study on disintegration of unsaturated red clay in Ca2+ solution environment

Sample

Relative clay mineral content (%)

Quartz (SiO2)

Kaolinite

Illite

Mensuration stone

Iron oxide

Potassium feldspar

The red clay

44.8

18.4

27.3

5.8

3.7