Using impact collision ion scattering, it was shown that the reconstruction of the (2 x 1)O-Cu(110) surface was of the missing-row type, where every other [001] row of copper atoms was missing. The oxygen atoms were located 0.08Å below the copper atoms of the remaining rows. The second layer copper atoms were shifted laterally 0.12Å away from the oxygen atoms in a pairing-row type reconstruction. The first layer was relaxed outward over 0.23Å compared to the ideal spacing, whereas the distance between the second and third layer remains unchanged. A critical comparison of these results with the data available in the literature showed that the position of copper and oxygen atoms could be determined with an accuracy of about 0.05 and 0.15Å, respectively.

Surface Structure Determination of the (2 x 1)O-Cu(110) Reconstruction by Low-Energy Ion Scattering. H.Dürr, T.Fauster, R.Schneider: Surface Science, 1991, 244[3], 237-46