The most common nonmetallic minerals
Our Land is rich in various resources. In terms of production in recent years non-metallic minerals are far ahead of metal ores. Non-metallic and therefore, non-metallic mineral formations on our planet do not require processing in industry and are used, so to speak, in its raw form. The most common non-metallic minerals in the world is rock salt (halite).
Even if you missed this information on the geography lessons in school, upon reflection, you can logically come to that conclusion. Rock salt was formed when the liquid evaporates from sea water. And since our planet is at 72% consists of water, the result of evaporation in the ancient depressions, lagoons, and left nodules in each geological system.
Salt may lie how powerful layers and small patches of other species found worldwide. The largest deposits appeared 300 million years to the Permian period in areas with hot and dry climate. To date, the reserves of sodium salt amount to 120 billion tons on land and in the oceans — 27 kg / m3.
Even 2700 years BC, the Chinese have extracted salt by evaporation (what remained of a special treatise), but mechanical production was mastered later. Therefore, where it wasn’t enough, wars were fought, there were riots, and in Ethiopia, for example, bars of halite served cash.
Today is the cheapest (after water) natural material, year of production worldwide is over 200 million tons, and each of us eats about 7 pounds of salt for the same period. Half of all sodium salts is for the needs of the food industry, and the rest, fodder and industrial material. In Europe the largest deposits located in the Urals (Ekaterinburg), on the lake Baskunchak, in Belarus (Starobin), Ukraine (Artemovsk), in the Kara-Bogaz-Gol (Turkmenistan), as well as in USA, Germany and India.
Depending on the mechanical impurities halite can be different shades, from clear to black and can be found even with a high content of silver chloride (in Chile — ganthia).
Interestingly, the crystals of pure sodium chloride is completely non-hygroscopic substance. The additives of chlorides of calcium and magnesium allow the salt to absorb moisture and in this case it dampen. And while cracking Galit never crumble, but disintegrate is strictly for faces.
The most common non-metallic minerals in the world is present even in us — in person contains about 130 g of salt, without which it will not work cell, and the deviation in any direction will necessarily lead to system crashes.