The Pt(110)-(1 x 2) reconstruction was analyzed via low-energy alkali impact collision ion scattering spectroscopy. The data permitted a direct correlation with the atom positions in real space. The ψin patterns measured in 7 different azimuths were compared with various reconstruction models. Only the “missing row” model was compatible with all experimental data. The ability of alkali impact collision ion scattering spectroscopy to discriminate unequivocally between the “missing row” and the “saw tooth” model was demonstrated. It was also shown, that the reconstructed surface was not perfectly ordered. The reconstruction was well described by long atom rows in the <110> azimuth. On the average every second <110> row was missing, with some disorder occurring in the 1 x 2 periodicity.

Analysis of the Pt(110)-(1 x 2) Surface Reconstruction. H.Niehus: Surface Science, 1984, 145[2-3], 407-18