Intermetallic Compounds with 1D Infinite Tunnels. Syntheses and Structures of AAu₄In₂ (A = K, Rb)

Four intermetallic compounds K_xRb_1-xAu₄In₂ (x = 0−1) synthesized by high-temperature solid-state reactions display 1D infinite tunnel constructions with Au−In frameworks. These compounds show small but different cation displacements in the tunnels and are also air and moisture inert at room temperature, even in concentrated HCl(aq).