Researchers from the Electronic Ceramics Department (Matic Belak Vivod and Mirela Dragomir) in collaboration with colleagues from Slovenia (Matic Lozinšek, Zvonko Jagličić), Canada (Graham King, CLS), and France (Thomas C. Hansen, ILL), have published an article in the Journal of the American Chemical Society, introducing mechanochemistry as a new approach for synthesizing reactive silver(II) compounds. This innovative method enabled the preparation of the first binary mixed-valent silver(I,II) fluorides, Ag₃F₄ and Ag₂F₃. The findings suggest that mechanochemical synthesis can expand the silver(II) chemistry, and it could be applied to the synthesis of other mixed-valence phases and compounds of transition metals in rare oxidation states.