Clay

Clay - a widespread rock. The clay is obtained through the weathering of other rocks. The basic structure of clay - it’s feldspar. In its pure form in nature, clay is practically nonexistent. The composition of the clay are constantly oxide of manganese and iron, calcium carbonate and various other chemical compounds. In addition, the composition of the clay are organic substances such as quartz, mica, hematite and feldspar above. All of these substances in different proportions make the clay is very volatile. Clay in its dry form, is a dense zemlyanistoe are often a fatty substance to the touch. Clay is easily ground to powder and sticks to the tongue. Clay absorbs a large volume of water and thus has its own smell and becomes plastic.

What is in and where the clay?

In nature, clay is found next to a broken spar box, rocks, or at the bottom of rivers, seas and oceans. In this clay is mixed with other active substances. Because of this clay is found in all, both old and new deposits. Most often, of course clay can be found in new deposits.

Because of its varied composition, location and time of formation, the clay had many names and varieties. Clay is divided by age, such as Jurassic clay. It is also distinguished by the composition of the clay, for example ornatovaya clay. For technical applications of clay is divided into a brick or pottery. Also divided clay and mineral composition, such as quartz.

A variety of clay - kaolin.

The main kind of clay is kaolin (pure clay) or shale. Kaolin is found mainly in granites, syenites, gneisses and felsic porphyry. The most famous place of kaolin are located in Saxony, England, Bohemia and China. In Russia, the best varieties of clay are Chernigov, Alexander, Glukhovsky, Ekaterinoslav province. In contrast to the kaolin clay has a lot of impurities, and because of that it has fewer refractoriness. The best kinds of clay pot found in Russia in Moscow (Gzhel clay), Novgorod, Poltava province.

Shale.

Shale – is compacted under pressure of other breeds of substance. This clay layered and usually has black or dark gray. Color is mostly clay gets because of the content in these rocks of carbonaceous substances. The basic composition of shale – The list of this and mica. In the form of impurities in the clay shale can also be found hornblende, hematite and other useful materials.

The natural value of the clay.

Of great importance is the clay and to nature. The clay absorbs water and the remaining water is flowing over the surface. Due to this property of clay, you can find wells or artesian water.

It is widely used around the world. Pottery, which is based on making bricks. Technical Ceramics which uses the best quality raw materials with the desired properties of an eclectic, strength, chemical composition. It is also used for the manufacture of cement needed in the construction. It is used even in religion. Thus, for example in the Bible says that God created by man was fashioned from clay. The most famous of these books was “Adam’s book” tells about his life with Eve after the Expulsion. Also it is mentioned as one of the mythological creatures – Prague Golem. This is a man of lively inanimate matter Kabbalists.