Cover Feature: Unexpected Coexisting Solid Solutions in the Quasi‐Binary Ag(II)F2/Cu(II)F2 Phase Diagram

In the presence of F2 overpressure, at elevated temperature, and despite the similarity of their crystal structures, CuF2 and AgF2 unexpectedly form two distinct solid solutions, (Cu1−xAgx)F2 and (Ag1−xCux)F2. Each phase shows different mutual solubility of Cu2+ and Ag2+ (shown as yellow and violet balls), and their magnetic properties are strongly impacted by this seemingly simple isoelectronic substitution. More information can be found in the Research Article by Z. Mazej, J. Lorenzana, W. Grochala, and co‐workers (DOI: 10.1002/chem.202301092). Cover image: Małgorzata Fürst.