Modular Principle for Complex Disordered Tetrahedral Frameworks in Quenched High-Pressure Phases of Phosphorus Oxide Nitrides.

Invited for the cover of this issue are the groups of Oliver Oeckler at Leipzig University and Wolfgang Schnick at University of Munich (LMU). The image background depicts a diffraction pattern of an intergrown crystal containing P O N as a night sky. P O N and P O N form complex disordered frameworks, a cutout of which symbolizes the earth's surface (which mainly contains silicates with related building blocks). The structures are built up from chain-like building units, which fall like rain, symbolizing the modular building scheme. Read the full text of the article at 10.1002/chem.202203892.