Gan soil detailed classification, performance, and the main effect


For the silicate mineral montmorillonite, bleaching earth or its mixture.


Heat clearing and detoxicating. The main food or mushroom poisoning

“Chinese Materia Medica”: “the Lord of the bacterial toxin. At the end of the hot soup.

Bleaching Earth

The ecological environment:

Tuff or other volcano rock in alkaline water under the action of the alteration and.

The original form:

The montmorillonite

It is earthy. White, gray green or pink. Soapy. Strong water absorption, water absorption and swelling volume with, but in the heating after the loss of moisture absorption. Department of tuff or other volcano rock in alkaline water under the action of the alteration and.

The bleaching clay

A scattered, with a greasy feeling. The light gray color, green gray to nearly black. The powder into the water.

The bentonite

As taking montmorillonite as main component of clay. The monoclinic crystal structure of montmorillonite. Chang Chengyin crystal soil shaped block, sometimes as small scaly, chondrite. White, gray, pink, light green or other color. White stripe. Earthy luster. The naked eye can not see a set of perfect cleavage. The hardness of 1-2. Block softness, smoothness. The relative density of 2-2.7. Water expansion, the volume can be increased by several times, and into a paste. With very strong adsorption and ion exchange capacity.

The character identification:

This product is block shaped, white or grey, some due to impurities and dyed pink. Opaque; earthy luster. Hardness is low, the nail can be carved into the mark. With strong water absorption, lick the suction. The expansion of the water, and then collapse into the fine or powder. With a greasy feel. Micro soil smell, taste light. The color white, creamy feel, with strong suction force is preferred.

Microscopic identification

Polarizing microscope: thin, pale green colorless microstrip. Microcrystalline, cryptocrystalline montmorillonite are uniformly distributed particles and other clay minerals, such as quartz, rock powder and other minerals, grain size below 0.001mm. Microcrystalline montmorillonite often like leaf like, mesh distribution in rocks, local still see plaque, scaly; flake particle size in 0.002mm.

The content of montmorillonite 70%-80%. Other clay minerals: 30%-20% cryptocrystalline quartz, microcrystalline quartz, mica and other microcrystalline mineral content.

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