The puzzling structural details of the mixed oxide AgCuO2 are shown to be related to a charge transfer between the AgO2 extended units and the CuO2 chains. As a result the system behaves as a metal and the silver atoms form quite stable chains that can easily slide among the CuO2 chains.

Charge Delocalization, Oxidation States, and Silver Mobility in the Mixed Silver−Copper Oxide AgCuO2
Abel Carreras, Sergio Conejeros,  Agustín Camón, Alberto García, Nieves Casañ-Pastor, Pere Alemany, Enric Canadell
Inorganic Chemistry 58, 7026−7035, 2019
DOI: 10.1021/acs.inorgchem.9b00662

Figure: The crystal structure of AgCuO2 is built from the condensation of CuO2 chains and AgO2 units (top left). As a result of an electron transfer between formally Ag+ and Cu3+ d levels a Fermi surface (top right) with Ag and Cu contribution is created leading to a metallic behavior. Such transfer stabilizes oxidized silver and oxidized copper, and the structure may be described as Ag-O planes with intercalated Cu-O chains in between (center down).

Coordination
Anna May-Masnou This email address is being protected from spambots. You need JavaScript enabled to view it.
Redaction
Anna May-Masnou This email address is being protected from spambots. You need JavaScript enabled to view it.
Web & Graphic Editor
José Antonio Gómez  This email address is being protected from spambots. You need JavaScript enabled to view it.

Webmasters
José Antonio Gómez This email address is being protected from spambots. You need JavaScript enabled to view it.
Albert Moreno     This email address is being protected from spambots. You need JavaScript enabled to view it.
ICMAB