ABOUT THE GOLD
Bring gold to representatives of precious metals. It has yellow color, which gives with its external attractiveness. The gold – quite soft, but at the same time dense and the heavy metal. According to density indicators, it occupies seventh place after osmium, iridium, platinum and some other metals.
In fact, tungsten is characterized with such density indicators.
Bring gold to representatives of precious metals. It has yellow color, which gives with its external attractiveness. The gold – quite soft, but at the same time dense and the heavy metal. According to density indicators, it occupies seventh place after osmium, iridium, platinum and some other metals.
In fact, tungsten is characterized with such density indicators. This characteristic is undeniably one of the advantages of gold, as it significantly simplifies the process of obtaining it. Another special feature of the metal – its high plasticity. This characteristic significantly expands the sphere of its use.
For example, from gold you can make a wire whose linear density is 2mg/m. With other metals it is actually impossible to strive for such a result.
If we talk about the chemical properties of gold, it is one of the most inert metals. It does not enter into the reaction with the main part of the existing acids, does not form the oxides.
However, there is one defect in it - the metal is destroyed as a result of the action of the alkaline environment. The gold is subject to dissolution in chlorine water and enters the reaction with the bromine.
THE LOOTY OF THE MERIAL TREASURE
In the earth's crust this metal is contained in a small number, but the sites rich in metal and deposits of gold contain quite a large amount. Choose 15 minerals that contain this metal. To the widest it is necessary to bring widespread gold, coppery, iridescent, platinum, natural.
If to speak about natural gold, it includes impurities of copper, silver and other rare earth metals. When mining metal in the deposits it is extracted from sulfides and arsenides.
Also choose the secondary deposits of these mineral resources, which consist of the deposits. It is not uncommon for gold to be taken out as an incidental product when mining ores.
Gold began to be acquired during the Neolithic period. Such an opportunity was due to the fact that this metal received wide distribution in its natural state. Its mass prey began in the Middle East. At that time it was used to make the gold jewelry that spread throughout the world through Egypt.
If we talk about gold mining on the territory of Russia, these mineral resources were of no interest to people until Elizavetian times. The first occurrence of the metal was discovered only in 1732.
It is interesting that for the entire history of our existence about 161 thousand tons of gold were acquired. This metal, according to experts' estimates, has received the widest distribution in financial organizations, in the production of jewelry, in the production of the electronics industry, as investments, in stomatology.
Most of the gold is acquired in China, Australia, Russia, the USA, Canada, the South African Republic, Peru, Uzbekistan. On the territory of the Russian Federation there are 37 companies specializing in gold mining. Most deposits of these mineral resources are concentrated in 15 regions.
Some of them are Amur region, Sakha Republic, Irkutsk region, Transbaikalia, Krasnoyarsk region.
THE FIELD OF APPLICATION OF GOLD
Like the object of investment. Most of the gold purchased is used as investments. People keep gold in the form of gold bars or gold jewelry. There is also a fairly high demand for coins made of this precious metal.
Industry. Gold has unique properties, which is why it has received wide distribution in various spheres of human activity. It has proven itself from the best side in the sphere of production of electrical contacts for microelectronics.
The precious metal is used in the nuclear industry. With its use fulfill the shell in the nuclear bombs. The gold has received distribution in the sphere of production of super-high vacuum technology. Here use it as fine laying. The technology of gold plating of metals is now highly demanded, allowing to ensure protection of products from environmental influences and to extend their service life.
The production of jewelry. Jewelry made of gold has always been in high demand. The objects made of pure gold represent the most value. However, its alloys with other metals are also used in the jewelry industry.
The stomatology. In this sphere there is a high demand for gold crowns and dental processes, for the production of which use alloys of gold with palladium, zinc, cobalt. The obtained material has excellent indicators of mechanical durability and resistance to corrosion.
