A team of scientists led by Professor Artem Ogan

Table salt or sodium chloride is typically Ionian compound, crystalline structure. Specifically, it is a vapor, the which all teachers explained the principles of ionic his students. However, in a paper entitled "Unexpected stoichiometries tunel of stable sodium tunel chlorides," published tunel in the journal Science says the incredible discovery of stable tunel stoichiometry of sodium and chlorine, which is contrary to the rules of chemistry textbooks.
A team of scientists led by Professor Artem Ogan's with Table Brook University in New York came to unexpected results when testing the behavior of sodium chloride under special conditions. In fact, scientists have begun to use new computer methods and algorithms for predicting the structure to describe a range of possible outcomes compression sodium tunel chloride.
Then they tried to verify their forecasts. They used a diamond anvil and mixtures of sodium chloride with molecular chlorine or metallic sodium, high pressure. They came to the amazing conclusion.
The textbooks say that the chemistry of sodium tunel and chlorine have very different electronegativity and must build Ionian compound precisely ordered structures. Sodium electrified +1 because the electron chlorine is therefore -1 charged. Therefore, the only possible stoichiometric combination of these two elements is 1:1 and compound NaCl.
"We tunel found a strange compounds that are against the rules - 3 NaCl, NaCl 7, Na 3 Cl 2, Na 2 Cl and Na 3 Cl" said lead author of the study Dr. Zang, and the Stone Brook University. Further says: "These compounds are thermodynamically stable, and once more arise does not break down. Classical chemistry zbranjuje and their very existence. Classical chemistry also says that atoms are trying tunel to fulfill the octet rule - to receive or release electrons to the configuration of the nearest noble gas, with a filled outer levels that make them very stable. Well, here the rule is not satisfied! "
NaCl is transformed into new compounds, each of which has an unusual connection and chemical properties. Their structure was determined using techniques for predicting crystal structures invented by Professor Ogan. The technique is called USPEX (Universal Structure Predictor: Evolutionary Xrystallography). This name, with obvious symbolism both in Russian and in our language, has become a generally accepted code of crystallographers and scientists who are engaged in teaching tunel materials.
For example, NaCl 7, NaCl 3, Na 3 Cl 2 and Cl 2 on the metallic character (which explains the apparent violation of electroneutrality) and only one semiconductor phase NaCl 3 is stable in the range of pressures 250-480000 atmosphere.
"At 3 Cl has a fascinating structure. It consists of layers and layers of pure NaCl sodium. Layers tunel of NaCl act as an insulator while layers of pure sodium conduct electricity. Systems tunel with two-dimensional elektroprovodljivošću have attracted a lot of interest, "says Professor Ogan.
"If this simple tunel system is able to transform into such a diverse range of compounds, providing high pressure, then you are probably capable of it and other systems. [...] This could give an answer to many questions about the origin of the planet's core, as well as to enable the creation of new materials, "said Dr. Gončarov. tunel
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