Clay mineral composition and smectite contents were measured using XRD and dye absorption methods.

Based on the above,the authors discussed the relation between the montmorillonite content,the exchangeable cationic type between layer and its amount,the montmorillonite structure and the swelling performance of bentonite.

The data from the determination of cation exchange capacity and montmorillonite contents in expansive soils have been used in evaluation and classification of expansive soils according to occupation standard of TB 10042-95.

Essential mineral and crystal chemistry data of 64 Al-containing dioctahedral smectitesamples from China are statistically analyzed, showing that the octahedral composition is amain factor affecting the mineralogical and physico-chemical properties of smectite.

A study on abnormal transformation of smectite clay minerals-taking Jung-gar Basin as an example;

The brief introduction is covered with the smectite clay mineral,then covered with the current situation of smectite research,also this text makes simple analysis about developmental situation of the medical auxiliary materials in our country and semctite research both at home and abroad of mineral.

The results indicated that the content of smectite was the highest,illite less and the content of clay minerals in kaolinite and vermiculite was all very low.

Results The change of ginseng saponin content for freezy- drying i.

Effects of Mg fertilization on growth,nutrient absorption and total saponins content of Paris polyphilla var.yunnanensis