'Black nitrogen' solves periodic table puzzle

[Still Waters]

In the periodic table of elements there is one golden rule for carbon, oxygen and other light elements: Under high pressures, they have similar structures to heavier elements in the same group of elements. But nitrogen always seemed unwilling to toe the line. However, high-pressure chemistry researchers of the University of Bayreuth have disproved this special status. Out of nitrogen, they created a crystalline structure which, under normal conditions, occurs in black phosphorus and arsenic. The structure contains two-dimensional atomic layers, and is therefore of great interest for high-tech electronics. The scientists have presented this "black nitrogen" in Physical Review Letters.

https://phys.org/news/2020-06-black-nitrogen-high-pressure-material-puzzle.html

https://www.sciencealert.com/a-new-kind-of-black-nitrogen-finally-resolves-a-periodic-table-mystery

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.216001

[SHaYap]

Black nitrogen matters! 

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