The sulfur

The Earth's crust is found sulfur in the free state and bound form. Sulfur in the native state, as well as in the form of sulfur compounds is known from ancient times. With the smell of burning sulfur, suffocating effect of sulfur dioxide and hydrogen sulfide humanity met, probably in prehistoric times. It is because of these properties, it was used by the priests in the composition of the sacred incense during religious ceremonies. Approximately 8 century Chinese began to use it in pyrotechnic mixtures. Thus, its exact origin is not established, but this element is used before the birth of Christ, and thus familiar to people since ancient times.

The Earth's crust is found sulfur in the free state and bound form

During the period of Arab alchemy originated the theory of mercury-sulfuric composition of metals, according to which the sulfur revered mandatory part of all metals. In the future, it has become one of the three principles of the alchemists.

There are two sulfur theory of education: syngenesis and epigenesis. Syngenesis theory suggests that the formation of native sulfur occurred in shallow pools. Special bacteria reduce sulfates, dissolved in water to hydrogen sulfide, which rose up, fell into the oxidation zone and are chemically or with the participation of other bacteria oxidized to elemental sulfur. Sulfur precipitated on the bottom, and subsequently its yl formed containing ore. Epigenesis theory suggests that the underground water penetrating through the rock strata are enriched with sulfates. If such water deposits in contact with oil or natural gas, the sulfate ions are reduced to hydrogen sulphide in hydrocarbons. Hydrogen sulfide rises to the surface and is oxidized in a pure sulfur.

Sulphur heated with caoutchouc, turns it into rubber. This method was discovered in 1843. The inventor called it "curing" in honor of the mythical god Volcano. Since the native sulfur was mined underground, and rare sulfur compounds released during volcanic eruptions in the myths it is called bile god Vulcan.

In the air sulfur burns to form sulfur dioxide - a colorless gas with a pungent odor. Its melt reacts with chlorine. When heated, it also reacts with phosphorus, forming a mixture of phosphorus sulfides, among them - the higher sulphide P2S5. In addition, when heated it reacts with hydrogen, carbon and silicon.

Sulphur is one of the bioelements. It is part of certain amino acids (cysteine, methionine), vitamins (biotin, thiamin) enzymes. Sulfur is involved in the formation of the tertiary structure of the protein. It is also involved in bacterial photosynthesis.

Recently more and more common sulfur is used as a building material. Sulfur, reinforced with glass fibers, is used to make large blocks for the walls of houses. The walls of this material have excellent hydro and sound insulation properties. It is interesting that the units are bonded to one another with a solution of sulphate acid. Currently, sulfur is mainly produced by melting sulfur directly in the places of its occurrence.