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We report high resolution low-energy-electron-diffraction measurements on the Pd(110) surface. We demonstrate that the clean surface consists of semiordered islands. The island structure is stable up to 650'C at which point the island edges roughen and step-step correlations decrease. Above 1100'C, surface evaporation becomes important and the surface becomes kinetically rough. A simple model is presented that makes use of step-step interactions to generate the periodic island structure. Thisdoi:10.1103/physrevb.48.14577 pmid:10007879 fatcat:4fzpyx6mmfhhdion54fcdglyom