Adsorption of sulfur on Ag(100)

► The (√17 × √17)R14° phase of sulfur on Ag(100) is a reconstruction in which 5 Ag atoms are removed from the (100) surface plane. ► The same model applies to the (√17 × √17)R14° phase of sulfur on Cu(100), according to density functional theory. ► On Ag(100), the (√17 × √17)R14° phase coexists with the p(2 × 2) at a coverage slightly above 0.25. ► Chain-like structures are also observed in STM, although density functional theory does not predict chains as equilibrium phases.