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Figure 3 Schematic representation of the formation of the anionic framework structure of (I). (a): The wavy layer built from an edge-sharing linear chain by corner-sharing 4-membered rings and ladders by edge-sharing 8-membered rings; (b): The wavy layers intersecting each other with an approximate angle of 110° to the entire three-dimensional open-framework. (Black spheres: Cu atoms; white spheres: Se atoms). |