Sequential Polymerization of Nitrogen at High Pressures

With recent advancements in high‐pressure technologies, combined with synchrotron X‐ray diffraction, Raman spectroscopy, and density functional theory calculations, the study of crystal structures under high‐pressure conditions has progressed rapidly. Among various chemical systems, nitrides have been extensively investigated due to their potential applications as superhard materials, high‐energy‐density materials, and superconductors. In this review, we summarized the crystal structures and nitrogen polymerization behavior in nitrides synthesized in high‐pressure experiments. This overview aims to facilitate the design of new nitrides and enhance understanding of the formation pathways and structural diversity of polynitride compounds.