Born with a diamond anvil "a new compound that cannot exist"

Theoretical studies and experiments in recent years have shown that under high pressure, elements can form new compounds that are impossible in classical chemistry. The reporter learned from the Beijing High Voltage Research Center on the 30th that Li Kuo, a researcher at the center, and Chen Yue, a professor at the University of Hong Kong, first synthesized a new compound, Sn3Se4, which violates the common valence. The compound is metallic and converts to a superconductor at low temperatures and may have better physical properties. The relevant research results were published in the Physical Review Letter, the world's top academic journal published on the 28th.
As a dimension that is as important as temperature, pressure changes the structure of a substance by changing the atomic spacing and charge distribution to form a high-pressure phase with new properties. For example, scientists predict that under high pressure hydrogen will exhibit a metallic character - conductivity. In recent years, scientists have found that high pressure can also change the valence of elements. Some compounds that cannot exist under normal pressure conditions can be synthesized and stabilized under high pressure, constantly subverting our knowledge of the original chemical knowledge.
Researcher Li Kuo told the Science and Technology Daily that the Sn-Se system compound has good properties in photoelectric, thermoelectric and storage conversion. Usually, only two compounds, SnSe and SnSe2, can be observed. Then, is there any other new compound in the Sn-Se binary system?
Li Kuo and the team's Dr. Wang Lijuan and others used the diamond anvil laser heating technology to confirm the synthesis of the new compound Sn3Se4 by X-ray diffraction data at about 160,000 atmospheres and 925 degrees Celsius. "This is like water is hydrogen dioxygen, hydrogen peroxide is hydrogen dioxane, and an oxygen can disinfect. So is there hydrogen dioxygen trioxide or hydrogen dioxygen tetra? In the Sn-Se system, we use it." The 160,000 atmosphere of 'the power of the wilderness' got Sn3Se4. This actually tells us that the four or six main elements can form more new compounds that 'ghosts don't know'." Li Kuo said.

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