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Abstract:
The structural parameters of the R30° overlayer formed by N2 adsorption on Ru(0001) have been determined by a LEED IV analysis. The N2 molecules are coordinated to the surface at on-top sites with the interatomic axis perpendicular to the surface. The N-N bond length turns out to be 1.10±0.04 Å which equals the bond length of gaseous N2. The interaction of N2 with Ru(0001) is characterized by a lack of pronounced substrate distortions.